Asmight happen earlier this week, has confirmed a crossover with Valve for its co-op zombie shooter Zombie Army Trilogy.
The cast of Left 4 Dead andhave been added as playable characters. You can find out exactly how that happened in a free tie-in comic,
"We're delighted to be able to bring such iconic characters to Zombie Army Trilogy," Rebellion CEO Jason Kingsley wrote in a press release sent out yesterday. "As thrilling zombie shooters designed to be enjoyed with friends, Zombie Army Trilogy and Left 4 Dead share a lot of common ground."
Theshould automatically be added to your Steam library if you own the game.