COF was born out of my wish to learn DirectX programming. It is therefore not much more than a "wrapper-project" I needed to develop my gaming engine TMCE (Tilman Mehler's cool engine). But again it would be unfair not to release the game to the public ;-). I can imagine it is the perfect game to be played at your job (when you were actually supposed to work).
"Scary, but hilarious." (Review @ 3D2f.com)
COF requires a PC with Windows95/98/XP and DirectX9.0 or later. Simply unpack the archive to any desired location on your harddisk and run "climbers.exe" to start the game.
Note COF is also mirrored by several Shareware sites.