Stars of Left 4 Dead, Portal and Team Fortress are heading toward a hardback comic compilation, as Dark Horse announces Valve Presents: The Sacrifice for mid-November.

The Sacrifice shares its name with a mission pack for zombie survival game Left 4 Dead, already available to view online at

Similarly, a digital version of Lab Rat, the Portal 1 & 2 interquel, can be found at, and Team Fortress 2 has a varied canon located at

The collection brings together the Valve works in a 304-page, $30 hardback due for publication on November 16.

It joins a host of other game-to-comic conversions, including Dead Space, Mass Effect, Assassin's Creed and Street Fighter.