Valve Presents #1

This collection brings together a series of comic stories set in the universes of Valve's most popular video game franchises, including Team Fortress 2, Portal, and Left 4 Dead. The volume features the titular 'The Sacrifice' storyline, which bridges the gap between the Left 4 Dead games, alongside other original tales that expand on the characters and lore of these iconic titles. Published by Dark Horse in 2011, it offers fans a unique narrative extension of the gaming experiences.