A modernized Serious Sam Classic for modern PC's, using the old engine and game physics, available for purchase right now on Steam as a standalone game, currently in Steam Early Access. Includes new gamemodes, optimized networking and a lot more, with a brand new campaign in development.
It's a community-aided official project for Croteam. Anyone with something to contribute can message us at our forums or mail directly at firstname.lastname@example.org or email@example.com. Also, check out the official Serious Sam Revolution website!