Old computer games

Old PC games such as Super Mario brothers always have a unique quality that indicates the old computer style. It can be easily tell that it's digitalised than other styles, which is exactly what I need in the animation that I'm currently working on, due to the content of the character travels through the reality world and the digitalised world. I wanted to make a contrast between the two worlds, and I found that using these kind of old games' style is a great way of indicating the world which the charter is in currently.