Rampage Knights is a cooperative beat ’em up game mixed up with randomized dungeon crawling and exploration which you can play alone or with a friend online. It is a mix of games like Binding of Isaac and Golden Axe, boosted by a thrilling classic melee combat gameplay with some RPG elements.
The players try to get as far as possible in a dungeon with randomized items, spells, traps and encounters. Their heroes are upgraded along the way (both visually and gameplay-wise) as they find better weapons, items, magic powers and fight harder and harder monsters.
The game is available for Windows PC and Mac OS X on Steam.
More info and details on the Steam Store page.