Dark Art Studios has released their first ever tabletop game. Arena of Doom pits you against your opponents in a gladiator-style combat game set in a dark fantasy world. They have the game available for free to print and play over on their website.
Along with the game, you can also get their Dungeon Tiles and Background Soundscapes for free. So it's not just a rules set, but an entirely immersive gaming experience. Go check it out.