Visual interactions are the basic ones that don't influence the gameplay directly but help to polish our video game and characters, making them part of the environment that we are creating, contributing significantly to the immersion of the player in the game. There are many examples of this subject and we can find them in almost any type of game. This shows us the importance of the environment being part of the game and not merely existing to help fill the screen. It's getting more usual to see these types of interaction in games and players expect them. If there's an object in the game, it should do something, important or not. This makes the environment that we are creating more vibrant and alive, which is definitely a good thing.
We can find one of the first examples of environment interaction in the original Castlevania, released in 1986...
