"A fantasy d20-themed dungeon crawler", to quote DarkGod's comment. Inspired by Incursion by Julian Mensch. Made available under Open Game License. This is a non-profit fan project. No money is made. There are currently only two people working on the mod. However, we have released several beta versions so far.
The player is now asked for confirmation when setting up the game. Remember, gameplay settings can only be adjusted once as they affect the way the game generates stuff.