Raptor is a 2D Side Scroller by Raptor85.

Release notes:

What this is, is a test game for my 2D game engine, which is written to be able to quickly develop and deploy a game for windows, linux, and the psp, only having to write simple “entity” code then add an entity of that type to a level. (the idea is pretty much taken from the years i spent modding UT2004)

http://forums.qj.net/showthread.php?t=144487