Unreal (the very first game in the series) was the next game I felt in love with after Duke Nukem 3D. Unfortunately making maps for it prove to be quite difficult and I've managed to only make 3 of them, a trilogy I've called "Alien Levels" (inspired by Aliens and Predator movies).

Alien Level 1: unreal_Alien1.zip

Alien Level 2: unreal_Alien2.zip

Alien Level 3: unreal_Alien3.zip