SWOOOORDS! Colon Lords of the Sword is a 4-player cooperative dungeon crawling action game made in Unity 3D, inspired by Gauntlet, Golden Axe, Bastion, and Spiral Knights.
This game is simple hack'n'slash. Metal music is adding excellent atmosphere. Someone can say that this game has terrible graphics but it doesn't matter → this graphic style harmonize with battle style and music.
And if you want to fully enjoy then try multiplayer in 3 or more peoples. It's excellent!