Originally released in 1997, 3D Realms' Shadow Warrior is very much a product of its time. And since this is an old-school first-person shooter we're talking about here, that's actually a good thing. The cult classic can be found on Steam for free, but if you're looking for the definitive version, General Arcade and Devolver Digital have come out with Shadow Warrior Classic Redux.
Most notably, the package throws in the Wanton Destruction and Twin Dragon expansions, but there are also remastered visuals and a remixed soundtrack to round out the $8.49 purchase price. Later this summer, Devolver will roll out a promotion that rewards Classic Redux owners with a coupon for Flying Wild Hog's new Shadow Warrior. Features like online multiplayer through Steamworks and Linux support are also said to be upcoming.