"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 zone itself isn't finished, hence the WIP, but the look is already done. The floor tiles are Gervais, the wall tiles are my edits.