From The Game Creators:
Create 3D first person shooter games in minutes with no programming or art skills required. Simply paint your levels and select game content from a huge library of on-line and off-line content. If you ever wanted to create your own games but didn't know where to start, FPS Creator is ideally placed to teach you the basics of level design, game logic and performance considerations without sending you back to school. If you need some extra help, you can join a vibrant, enthusiastic and best of all free community of fellow game makers who can answer questions and exchange ideas. In development for well over three years, FPS Creator Free is supported by a development team who continue to release updates, features and model packs year after year.