Possible Worlds - Underwater action
Possible Worlds is a rather impressive Subwar / Wing Commander - style openGL accelerated 3D game with challenging missions.
Definitely Worth a look - http://possibleworlds.sourceforge.net/.
It has been ported by Yannick Erb.
It can be downloaded here.
Possible Worlds is an openGL-accelerated 3D game that was created in the course of a Computer Graphics lab exercise at the Technical University of Vienna. It won the competition for the best game hands down and it was originally intended to develop Possible Worlds even further with a network-multiplayer mode, more visual FX, etc.. But it never progressed further...