This is the definitive edition of the original Shadow Warrriors games from the 1990s. It separates itself from the "me, too" clones of Doom and Duke Nukem with it's irreverent sense of humor and some unique weapons. The story is paper thin, but the gameplay still shines. With several secret levels and other easter eggs to find, there's significant replay value as well. There are a few annoying things, seemingly random enemy behaviors sometimes and the airplane level is notoriously badly designed. But otherwise, this is a really good game!
