The Raycasting Game Maker is a free easy to use game editor that creates simple raycasting games in the style of Wolf3D. The finished game needs only two files to run, an executable and a pak file with the game data. The game runs in Windowed- or Fullscreen Mode and supports 16 and 32 bit color.
Great engine for newbie's and experienced ones(if bored ;P)
It is easy to use and the outcome is great gameplay wise.
Simple old'school graphics.
But i still only give it a 7 because of the limitations of this engine(5 enemies and only a few weapons.)
Anyways, it's a great engine!