Somebody on RPG.net found this site.
You can type anything into the little box at the top and it will turn it into a game concept. Unclick the "Sanity" box and it gets really goofy.
The following are based on a couple user names here. mind you adding caps or things changes stuff. so play around with it. http://orteil.dashnet.org/gamegen
An online game where you banish controversial topics and you can customize your character.
A war game where you distribute legendary warriors - or so it seems.
An MMO where you manage fish and it's WAY retro.
An indie game where you look at animals to gain levels.
An adventure game where you hang out with mutants through naval warfare.
The following are popular rpgs
A war game where you rename tunnels while stranded on an island.
A god game where you mindlessly click on your soul to win the game.
A mobile game where you explore dungeons with jazz singers and it's sort of a parody.