"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 next generation is here. This half-drow is a barbarian - sorry, you don't get to pick your kid's class. The test run kid was even better, a blackguard at lvl 1, because I forgot to exclude prestige classes from the pool.