The XI Cast engine, coupled with the Rival Game Creator, is a modern ray-casting engine that is designed to help those who wish to create 3D shooter games but have no knowledge of 3D programming. The Rival Game Creator features an easy to learn UI that is designed to be familiar and logical to follow, it will allow to you to create a first person shooter game in a matter of minutes.
This uses line-based collision detection along the X and Y co-ordinates (Like in Doom).
A lot of code made this possible, the performance hit was surprisingly minimal despite the large amount of checks.
The frame rate in this video is locked at 60, for some reason the engine displays it as 50/100, usually it shows a vsync, just ignore it, fraps reports high framerates when it's unlocked.