DOOM II: Maps of Chaos

Game MOD add-on includes the original and hardcore versions as well. If you thought MoC Hardcore was tough, you haven't seen anything yet. MoC Overkill will throw more at you and will generally won't give you a breather for your trigger finger, let alone using -fastmonsters/-fast. For the bloodthirsty and masochistic players, be it alone or with friends in co-op!