Art Skiles is recreating his original Commodore Amiga game in the Blender Game Engine.
I wrote the original game "Drip" for the Commodore Amiga back in the mid 80's and wondered if the BGE would allow me to "easily" do a cross-platform sequel. After fiddling with the 2.49b game engine and python in my spare time for the last few years I'm getting dangerously close. You can check out video updates at Youtube on the MrDrip2 channel.
My current plans are to release commercially. I released the original amiga game as charityware, asking that if you liked the game to please donate $5 to your favorite charity. I've also considered Kickstarter. It would be interesting to see if fellow blenderheads think it's Kickstarter worthy and at what goal amount.
The game is built entirely in Blender using 3D scenes. Using Gimp, Inkscape for 2D artwork and Audacity for sound effects/editing under Debian Linux.
No current plans to port to 2.63 but wouldn't be against it if it's not too much of a pain on the python side of things. As always, I'm open to suggestions.