- Jul 15, 2003
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Save 50% on Serious Sam: Siberian Mayhem on Steam
Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.
store.steampowered.com
Looks like it was made with the SS 4 engine, and it might be more enjoyable. I will not pre-purchase. I'll let you guys take the leap.