Fans of 28 Days Later and its sequel should get a load of this British PC game, in which London suffers not only nibbles from the walking dead, but also demon nuke drops and occult sadists. Of course, you won’t mistake Hellgate for some low-budget movie: The creators, who are also behind the terrifying blockbuster Diablo, have made a massive online world filled with real-to-life, randomly ordered detail—and some seriously impressive weapons.