It's said in txt that 'Overkill' is mainly designed for Dukematch. However Overkill is 100% single-player level. It's some sort of a city dock with industrial areas, lots of explosions (lots of cracks), some underwater ways & good puzzles. Gameplay is very good. You'll enjoy playing this level. All three keys must be found. There are many locations around the level and from one section you'll find an exploded wall to another etc. Level has some minor texture bugs such as bad textures & unaligned stuff but texturing is mostly very well done. This map is some years old and from James Duncan who also did "Condemed".