Team Fortress 2's Pyro and Saxton Hale, and Left 4 Dead's Zoey are joining Super Time Force when it's released on Steam next week. See their adorable pixelated avatars in action below:

"All three Valve characters, along with 50 new Helladeck challenge levels and the new Ultra Force power mode are available in Super Time Force Ultra for $14.99 when it launches on Steam August 25th."

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