Dead Maze is now available on Steam, offering a free-to-play 2D survival MMOG set during one of those ever-more-common zombie outbreaks. Here's a trailer showing off gameplay, and here are some details: "In Dead Maze, cooperation takes center stage. Join thousands of players working together to explore a devastated Western United States. Fight against the constant threat of the undead, scavenge what you can to survive, craft crucial supplies and weapons -- and ultimately rebuild society with friends."