DM-Deck16][, a remake of the original, with some extra changes.
DM-Morbias][, another remake of the original one for Unreal, this time with an extra redeemer.
The last match is a 1on1 match against Xan in DM-Hyperblast: a ship going hyperspace. Notably, Xan is a challenge because of the game's (at the time) excellent A.I. (With Dynamic Difficulty for him to boot)
DM-Barricade, a castle in the first Tournament... that's floating. In a lightning storm.
DM-Phobos: One of the most evocative and disorienting, since the skybox rotates with a panoramic view of Mars.