The game is called .kkrieger, it's currently only in the beta stage of development, but is playable.

How big is this game? 96KB. Using the same fucktacular compression and on-the-fly texture and sound generation as prior releases.
The games going to be 128KB when it's finished, which will take less than a second to download on standard high-speed.

Download it here:

Oh, the game relies heavily on pixel shaders 1.3, so odds are you'll need a geforce 4ti or better, or on the ATI end, a radeon 8500 or better.
C++ Should Have Been Called "D"