Bigger titles:
AAaaAaAAaA - A Reckless Disregard for gravity (Steam), The Wonderful End of the World (Steam), 1,2,3 Kick it! (Steam), PreVa (freeware now), Glider - collect ´n kill (DTP), Daemonica (A+ title from 2005), ~ 150 simulator games, Game Tycoon, Holiday Tycoon, and much more.
There`s even more to come. Role playing games like Rebel Planet Orion (
http://www.therebelplanet.com/), Multiplayer-games like CSiS (
http://www.csis-game.net/), shooters like Call of Death (
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showgallery&Number=363814).
Gamestudio has potential for commercial games.