Transrealism/Slipstream

This is a special genre which does not concern reality, but more of the total opposite. Science Fiction can be present in this genre as the author tries to make sense of the ridiculous. Slipstream conflicts with reality, making the impossible possible.

A good example is the game Little Big Planet where it is set in a sandbox world where the player can do just about anything with what they are given. Its design side is what we know of foam, fuzz, and sacks, which makes it highly improbable to exist. The science of the game is simple to understand

http://en.wikipedia.org/wiki/LittleBigPlanet

Another game example is the simple VVVVV. Its a simple 2D game where the science is in changing the gravity to evade obstacles. It’s a simple mechanic and so is the art style. Try it out

http://www.kongregate.com/games/TerryCavanagh/vvvvvv-demo

Slipstream is unrealistic and is a good genre where producers can invent new things and it is a genre where it goes beyond reality except by maintaining a small percentage of real life components to give us a loose sense of belief.