Capcom and Valve have partnered up to deliver crossover content for their respective zombie games as free downloads for PC players.
Characters from Left 4 Dead 2 - Coach, Nick, Ellis and Rochelle - will make the jump to Resident Evil 6 for a shootout in the game's PC-exclusive 'The Mercenaries No Mercy' mode. L4D 2 Special Infected, the Witch and a 'Mini Tank', will also make an appearance.
Meanwhile, enemies from Resi 6 will appear in the PC version of Left 4 Dead 2, including Lepotitsa, Napad and Ogroman.
Resident Evil 6 players will get their DLC on April 5, while Left 4 Dead 2 players have to settle for a more vague 'spring' ETA.
Both DLC updates will be free to all. Below is a developer interview video and some screenshots.