Best free games like Doom

If Doom taught us anything, it's that the best solution to an infestation of demons is apparently a shotgun and absolutely no interest in diplomacy. If you're looking for free games that capture some of that old-school FPS magic, you've come to the right place. Expect fast movement, big weapons, nasty monsters, maze-like levels and enough ammunition to make the local arms dealer very happy. Some of these games stick closely to the classic Doom formula, while others add new weapons, enemies, multiplayer modes or their own bizarre twists on the genre. Don't expect complicated skill trees or lengthy cutscenes explaining why you're shooting everything in sight. Sometimes you just need a corridor, a shotgun and several hundred things that desperately need shooting. So grab your virtual arsenal, check the corners carefully and prepare for the timeless FPS tradition of getting lost while insisting that you definitely remember this level.