People who are constantly pitting the Left 4 Dead franchise against the newer spate of more action-oriented Resident Evils should stop now, because Capcom and Valve have recently joined forces in order to produce Resident Evil 6 x Left 4 Dead 2, which will feature the zombie-killers and monsters from both franchises crossing over into each other’s respective settings.
Astute gamers will remember that Capcom is heavily into inter-franchise crossovers, and has recently replaced their “vs.” series of names with the “x” branding, resulting in Street Fighter x Tekken and the fan-made, yet officially adopted Megaman x Street Fighter. Unlike those two, Resident Evil 6 x Left 4 Dead 2 will not be a stand alone game. Instead, it will be coming to the PC version of Resident Evil 6 as a free update.
You can check out the dev diary for more info: