From the publishers website:
Instant Game is the completely random gaming system through which the players and gamemaster determine the genre, setting, location and plot of the game at the beginning of each session. Years in development, the full version of Instant Game comes with all the rules for creating and playing a campaign, and has the full charts for creating every aspect of your game session, including optional tables for villains, major NPCs, personality traits and more.
Here's the deal- a lot of roleplaying games claim to be "pick up and play" games. They're full of it, because Instant Game is the genuine article. At the start of an Instant Game session, neither the GM nor the players know what game they will be playing. The game master and players sit down with the Instant Game tables (and trust us, there's a ton of tables) and roll up what the game genre, play style, tech level and other variables of the game will be. While the players make their characters, the GM uses the other tables to determine other game factors like the game objective, starting location, villains, major NPCs and the like. We are fully aware how intimidating this sounds-- the prospect of sitting down with your group to play a game without even knowing if it's going to be a high magic fantasy warlord game or a modern era espionage thriller with zombies-- but just download the game and roll up some sample games and you'll see what we're so excited about.
Instant Game is unlike any other RPG that you've ever played. But don't take our word for it, spend a couple hours playing it... then you'll understand