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Home > Game Development > 3D Game Development > Unity 5.x By Example
Unity 5.x By Example
Unity 5.x By Example

Unity 5.x By Example: An example-based practical guide to get you up and running with Unity 5.x

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Unity 5.x By Example

Chapter 2. Project A – the Collection Game Continued

This chapter continues from the previous one by building a collection game with Unity. In this game, the player wanders an environment in first-person mode, searching for and collecting all coins in a scene before a global timer expires. If all coins are collected before timer expiry, the game is won. However, if the timer expires before all coins are collected, the game is lost. The project created so far features a complete environment, with a floor, props, and water, and it also features a first-person controller along with a basic coin object, which looks correct in shape and form but still cannot be collected.

This chapter completes the project by creating a coin object to collect and adding a timer system to determine whether the total game time has elapsed. In essence, this chapter is about defining a system of logic and rules governing the game. To achieve this, we'll need to code in C# and so this chapter...

Creating a coin material

The previous chapter closed by creating a basic coin object from a non-uniformly scaled cylinder primitive. This object was created by selecting GameObject | 3D Object | Cylinder from the application menu. See Figure 2.1. The coin object, as a concept, represents a basic or fundamental unit in our game logic because the player character should be actively searching the level looking for coins to collect before a timer runs out. This means that the coin is more than mere appearance; its purpose in the game is not simply eye candy, but is functional. It makes an immense difference to the game outcome whether the coin is collected by the player or not. Therefore, the coin object, as it stands, is lacking in two important respects. Firstly, it looks dull and grey—it doesn't really stand out and grab the player's attention. Secondly, the coin cannot actually be collected yet. Certainly, the player can walk into the coin, but nothing appropriate happens...

C# scripting in Unity

Defining game logic, rules, and behavior often requires scripting. Specifically, to transform a static and lifeless scene with objects into an environment that does something, a developer needs to code behaviors. It requires someone to define how things should act and react under specific conditions. The coin collection game is no exception to this. In particular, it requires three main features:

  • To know when the player collects a coin
  • To keep track of how many coins are collected during gameplay
  • To determine whether a timer has expired

There's no default out-of-the-box functionality included with Unity to handle this scenario. So we must write some code to achieve it. Unity supports two languages, namely, UnityScript (sometimes called JavaScript) and C#. Both are capable and useful languages, but this book uses C# because, going forward, support for JavaScript will eventually be dropped. Let's start coding these three features in sequence. To create a new script...

Counting coins

The coin collection game wouldn't really be much of a game if there were only one coin. The central idea is that a level should feature many coins, all of which the player should collect before a timer expires. Now, to know whether all coins have been collected, we'll need to know how many coins there are in total in the scene. After all, if we don't know how many coins there are, then we can't know if we've collected them all. So, our first task in scripting is to configure the Coin class so that we can know the total number of coins in the scene at any moment easily. Consider Code Sample 2.3, which adapts the Coin class to achieve this:

//-------------------------
using UnityEngine;
using System.Collections;
//-------------------------
public class Coin : MonoBehaviour 
{
  //-------------------------
  //Keeps track of total coin count in scene
  public static int CoinCount = 0;
  //-------------------------
  // Use this for initialization
  void...

Collecting coins

Previously, we developed a coin counting variable telling us how many coins are in the scene. However, regardless of the count, the player still can't collect the coins during gameplay. Let's fix this now. To start, we need to think about collisions. Thinking carefully, we know that a coin is considered collected whenever the player walks into it, that is, a coin is collected when the player and the coin intersect or collide.

To determine when a collision happens like that, we must approximate the volume of both the player and coin in order to determine when the two volumes overlap in space. This is achieved in Unity through colliders. Colliders are special physics objects attached to meshes. They tell us when two meshes intersect. The FPSController object (First-person controller) already has a collider on it, through its Character Controller component. This approximates the physical body of a generic person. This can be confirmed by selecting FPSController in...

Coins and prefabs

The basic coin functionality is now created, but the scene needs more than one coin. The problem with simply duplicating a coin and scattering the duplicates is that if we make a change later to one coin and need to propagate that change to all other coins, we'd need to delete the former duplicates and manually replace those with newer and amended duplicates. To avoid this tedious repetition, we can use prefabs. Prefabs let you convert an object in the scene to Assets in the Project panel. This can be instantiated in the scene as frequently as needed, as though it were a mesh asset. The advantage is that changes made to the asset are automatically applied to all instances automatically, even across multiple scenes.

This makes it easier to work with custom assets, so let's prefab the coin right now. To do this, select the Coin object in the scene and then drag and drop it in the Project panel. When this happens, a new prefab is created. The object in the scene...

Creating a coin material

The previous chapter closed by creating a basic coin object from a non-uniformly scaled cylinder primitive. This object was created by selecting GameObject | 3D Object | Cylinder from the application menu. See Figure 2.1. The coin object, as a concept, represents a basic or fundamental unit in our game logic because the player character should be actively searching the level looking for coins to collect before a timer runs out. This means that the coin is more than mere appearance; its purpose in the game is not simply eye candy, but is functional. It makes an immense difference to the game outcome whether the coin is collected by the player or not. Therefore, the coin object, as it stands, is lacking in two important respects. Firstly, it looks dull and grey—it doesn't really stand out and grab the player's attention. Secondly, the coin cannot actually be collected yet. Certainly, the player can walk into the coin, but nothing appropriate happens in response.

Figure...

C# scripting in Unity

Defining game logic, rules, and behavior often requires scripting. Specifically, to transform a static and lifeless scene with objects into an environment that does something, a developer needs to code behaviors. It requires someone to define how things should act and react under specific conditions. The coin collection game is no exception to this. In particular, it requires three main features:

  • To know when the player collects a coin

  • To keep track of how many coins are collected during gameplay

  • To determine whether a timer has expired

There's no default out-of-the-box functionality included with Unity to handle this scenario. So we must write some code to achieve it. Unity supports two languages, namely, UnityScript (sometimes called JavaScript) and C#. Both are capable and useful languages, but this book uses C# because, going forward, support for JavaScript will eventually be dropped. Let's start coding these three features in sequence. To create a new script file,...

Counting coins

The coin collection game wouldn't really be much of a game if there were only one coin. The central idea is that a level should feature many coins, all of which the player should collect before a timer expires. Now, to know whether all coins have been collected, we'll need to know how many coins there are in total in the scene. After all, if we don't know how many coins there are, then we can't know if we've collected them all. So, our first task in scripting is to configure the Coin class so that we can know the total number of coins in the scene at any moment easily. Consider Code Sample 2.3, which adapts the Coin class to achieve this:

//-------------------------
using UnityEngine;
using System.Collections;
//-------------------------
public class Coin : MonoBehaviour 
{
  //-------------------------
  //Keeps track of total coin count in scene
  public static int CoinCount = 0;
  //-------------------------
  // Use this for initialization
  void Start () 
{
    //Object...

Collecting coins

Previously, we developed a coin counting variable telling us how many coins are in the scene. However, regardless of the count, the player still can't collect the coins during gameplay. Let's fix this now. To start, we need to think about collisions. Thinking carefully, we know that a coin is considered collected whenever the player walks into it, that is, a coin is collected when the player and the coin intersect or collide.

To determine when a collision happens like that, we must approximate the volume of both the player and coin in order to determine when the two volumes overlap in space. This is achieved in Unity through colliders. Colliders are special physics objects attached to meshes. They tell us when two meshes intersect. The FPSController object (First-person controller) already has a collider on it, through its Character Controller component. This approximates the physical body of a generic person. This can be confirmed by selecting FPSController in the Scene...

Coins and prefabs

The basic coin functionality is now created, but the scene needs more than one coin. The problem with simply duplicating a coin and scattering the duplicates is that if we make a change later to one coin and need to propagate that change to all other coins, we'd need to delete the former duplicates and manually replace those with newer and amended duplicates. To avoid this tedious repetition, we can use prefabs. Prefabs let you convert an object in the scene to Assets in the Project panel. This can be instantiated in the scene as frequently as needed, as though it were a mesh asset. The advantage is that changes made to the asset are automatically applied to all instances automatically, even across multiple scenes.

This makes it easier to work with custom assets, so let's prefab the coin right now. To do this, select the Coin object in the scene and then drag and drop it in the Project panel. When this happens, a new prefab is created. The object in the scene is automatically...

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Key benefits

  • The most updated resource on Unity 5.x with comprehensive discussion on all the new features of Unity 5.x
  • Understand the core concepts surrounding Unity5 game development with this power-packed hands-on guide
  • Brush up your existing game development skills and create games that have a brilliant gameplay using the excellent examples from this book

Description

Unity is an exciting and popular engine in the game industry. Throughout this book, you’ll learn how to use Unity by making four fun game projects, from shooters and platformers to exploration and adventure games. Unity 5 By Example is an easy-to-follow guide for quickly learning how to use Unity in practical context, step by step, by making real-world game projects. Even if you have no previous experience of Unity, this book will help you understand the toolset in depth. You'll learn how to create a time-critical collection game, a twin-stick space shooter, a platformer, and an action-fest game with intelligent enemies. In clear and accessible prose, this book will present you with step-by-step tutorials for making four interesting games in Unity 5 and explain all the fundamental concepts along the way. Starting from the ground up and moving toward an intermediate level, this book will help you establish a strong foundation in making games with Unity 5.

Who is this book for?

The ideal target audience for this book would be game developers. They need not have previous experience with Unity since this book will cover all the basics about game development with unity. This would also be a very good resource for Unity developers who want to brush up their basic Unity skills and also get up and running with creating interesting games with Unity 5.x.

What you will learn

  • Understand core Unity concepts, such as game objects, components, and scenes
  • Learn level design techniques for building immersive and interesting worlds
  • Learn to make functional games with C# scripting
  • Use the toolset creatively to build games of different themes and styles
  • Learn to handle player controls and input functionality
  • Dive into the process of working with terrains and world-creation tools
  • Import custom content into Unity from third-party tools, such as Maya and Blender
  • Get to grips with making both 2D and 3D games
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Publication date : Mar 23, 2016
Length: 402 pages
Edition : 1st
Language : English
ISBN-13 : 9781785888380
Vendor :
Unity Technologies
Category :
Game Development
Languages :
C#
Concepts :
3D Game Development
Tools :
Unity

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Estimated delivery fee Deliver to Argentina

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Product Details

Publication date : Mar 23, 2016
Length: 402 pages
Edition : 1st
Language : English
ISBN-13 : 9781785888380
Vendor :
Unity Technologies
Category :
Game Development
Languages :
C#
Concepts :
3D Game Development
Tools :
Unity

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Table of Contents

9 Chapters
1. The Coin Collection Game – Part 1 Chevron down icon Chevron up icon
1. The Coin Collection Game – Part 1
Game design
Getting started – Unity and projects
Projects and project folders
Importing assets
Starting a level
Transformations and navigation
Scene building
Lighting and sky
Play testing and the Game tab
Adding a water plane
Adding a coin to collect
Summary
2. Project A – the Collection Game Continued Chevron down icon Chevron up icon
2. Project A – the Collection Game Continued
Creating a coin material
C# scripting in Unity
Counting coins
Collecting coins
Coins and prefabs
Timers and countdowns
Celebrations and fireworks!
Play testing
Building
Summary
3. Project B – the Space Shooter Chevron down icon Chevron up icon
3. Project B – the Space Shooter
Looking ahead – the completed project
Getting started with a space shooter
Creating a player object
Player input
Configuring the game camera
Bounds locking
Health
Death and particles
Enemies
Enemy spawning
Summary
4. Continuing the Space Shooter Chevron down icon Chevron up icon
4. Continuing the Space Shooter
Guns and gun turrets
Ammo prefabs
Ammo spawning
User controls
Scores and scoring – UI and text objects
Working with scores – scripting with text
Polishing
Testing and diagnosis
Building
Summary
5. Project C – a 2D Adventure Chevron down icon Chevron up icon
5. Project C – a 2D Adventure
A 2D Adventure – getting started
Importing assets
Creating an environment – getting started
Environment Physics
Creating a player
Scripting the player movement
Optimization
Summary
6. Continuing the 2D Adventure Chevron down icon Chevron up icon
6. Continuing the 2D Adventure
Moving platforms
Creating other scenes – levels 2 and 3
Kill zones
The UI health bar
Ammo and hazards
Gun turrets and ammo
NPCs and quests
Summary
7. Project D – Intelligent Enemies Chevron down icon Chevron up icon
7. Project D – Intelligent Enemies
An overview of the project
Getting started
Terrain construction
Navigation and navigation meshes
Building an NPC
Creating patrolling NPCs
Summary
8. Continuing with Intelligent Enemies Chevron down icon Chevron up icon
8. Continuing with Intelligent Enemies
Enemy AI – range of sight
An overview of Finite State Machines
The Patrol state
The Chase state
The Attack state
Summary
Index Chevron down icon Chevron up icon
Index

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Full star icon Full star icon Full star icon Half star icon Empty star icon 3.7
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HLC Sep 11, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good Introduction to Unity. This basically gives all the tools required to make your first basic games with minimal programming involved.
Amazon Verified review Amazon
Hugo Apr 23, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book teach how to build 3 complete and very different games on Unity 5.x from scratch, you will learn how to create the base of each project, how to proceed and create each feature, how to work in Unity editor using some features in a real project. The last two chapters teach how to create a more advanced game, by building a 3D terrain using terrain tools in Unity, a player that can explore and enemy's with AI that follows the player, this will apply most of the techniques showed in the previous chapters and also will able you to use your creativity to create gaming conditions, to finish this game, creating levels, more types of enemy's, the sky is the limit. I think book is for people that already know the basics of Unity and know how to code, more specifically in C#, but doesn't know about game development, but on the other hand, I think that everyone could take this book, even if you know nothing about game development in general but want to learn, or if you are already a game developer, because it will teach you very different techniques of game development, both 2D and 3D, the games are in an interesting scale of complexity, as you learn how to use the power's of Unity and after reading this book you become much more confident in game development, you will be prepared to start almost any kind of project, my suggestion is for start implementing more levels and features in book examples. This book helped me to learn more deeply Unity and I would suggest for my friends who like to create games, Unity is a good choice to start building games and this book is for sure an amazing guide to create complete games. The author know how to write and teach game development in Unity, if you search his name, you will see that he already has made some great games, write some good books and video courses.
Amazon Verified review Amazon
Amit Kumar Oct 07, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This Book is good for Beginners who wanna learn Game Designing from Starting
Amazon Verified review Amazon
Xa4 Apr 18, 2016
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Edit: the author just gave a link to the files in his twitter account ( @thorn_alan ) while we wait for the publisher to finally solve the issue. I've changed my rating accordingly, but it's only based on the first chapters so take the recoomendation with a grain of salt.The book is clear and well written, based on the first chapters. Unfortunately, later chapters require companion files to follow them, and one month after the book's release, they still aren't available on the book's website.I'll change my review when this problem is corrected, but in the meantime, you should delay your purchase.
Amazon Verified review Amazon
KeaganRiley Aug 10, 2020
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
I'm new to game dev but had no issues learning until the book gets to coding its scoring system for the first game. It uses Mono Develop, which I found to be a pain to try and install successfully and just plain not worth it. I tried continuing anyway and just using Visual Studio Code instead but the book's code was not compatible and I'm not experienced enough to properly adapt it. Wouldn't recommend it to beginners unless you're skilled enough in C# to problem solve the code.
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About the author

Profile icon Alan Thorn
Alan Thorn
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Alan Thorn is a multidisciplinary game developer, author, and educator with 16 years of industry experience. He makes games for PC desktop, mobile, and VR. He founded 'Wax Lyrical Games' and created the award-winning game Baron Wittard: Nemesis of Ragnarok, working as a designer, programmer, and artist. He has written 20 technical books on game development and presented fifteen video training courses. These cover gameplay programming, Unity development, 3D modelling, and animation. He has worked in game development education as a visiting lecturer for the National Film and Television School, as a lead teacher for Uppingham School, and as a senior lecturer at Teesside University.
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What is the digital copy I get with my Print order? Chevron down icon Chevron up icon

When you buy any Print edition of our Books, you can redeem (for free) the eBook edition of the Print Book you’ve purchased. This gives you instant access to your book when you make an order via PDF, EPUB or our online Reader experience.

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Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
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Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

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The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

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The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
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Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela