Sin demo (updated) -

Elexis Sinclaire, the beautiful but crazed CEO of SinTek Industries, is busy at work creating an army of genetic freaks to take over the world. As Col. John R. Blade, your mission is to penetrate the SinTek fortress and stop Elexis from executing her sinister plans. This demo of the game Sin offers two single-player levels and two deathmatch levels. The game uses an enhanced version of the Quake II engine, which allows it to provide 3D environments with 16-bit color and advanced lighting effects. The game also comes packed with an arsenal of conventional and futuristic weapons, advanced enemies that can duck and cover if wounded, and more. You can even match up against friends (or enemies) over your LAN or the Internet in deathmatch mode.

This demo has been improved and reworked since its original release and now includes two more deathmatch levels, improved network play, and numerous bug fixes.