Today is Free Comic Book Day, and to celebrate, Valve is offering an online-only Team Fortress digital comic.
Valve is currently digitally publishing a free quarterly Team Fortress comic book series, which recently published its third issue. The Team Fortress 2 Catch-Up comic gives new readers a chance to catch up. Full issues of the first three Team Fortress Comics are available for free online.
Team Fortress 2 is Valve's team-based first-person multiplayer shooter, first released in 2007.