Well here is another game on Steam this week that has come to my attention. It's called Endless Dead from a developer called Ghost Machine. I also have a trailer video.

The human race is in danger again. This time scientists could not cope the imminent threat and became monsters themselves. You and a small number of others have not been affected by the virus. Crowds of zombies fill the small town where you live which so happens is near the research base. The dreadful contagion is about to spread worldwide. Endless Dead is a 3D isometric Zombie Rougelike. Half RPG, Half Gauntlet clone that focuses on looting, action, and zombie carnage. Permadeath allows for short gameplay sessions, with maximum points awarded to those who can withstand the zombie hordes longer than anyone else. Epic boss battles bookend the onslaught of firepower that you yield and reward you with weapon and ability upgrades.

Play with a friend in Online Multiplayer in either co-op, or survival. Additional Deathmatch levels are planned, if you choose to fight against other players as well as AI zombies in a bizzare anything goes battle arena. Unlock new weapons and abilities on various indoor and outdoor levels. Follow the source of the story and return to the labs to distribute the vaccine.