Left 4 Dead 2

Left 4 Dead 2 (abbreviated as L4D2) is a zombie-themed first-person co-op shooter video game played by Markiplier, Bob, Wade and JackSepticEye.

Game Information
Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008. This co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans.

Episode

 * THE GNOME OF HEALING

Trivia

 * Mark played the game a number of times when his original YouTube channel was active and has logged hundreds of hours on it. The earliest known gameplay video was recorded by TheAndyHUNGRY featuring Markiplier and Octobarian.