Wow I'm surprised there are no topics for the amnesia fortnight bundle by double fine.
Basically double fine drop everything they are doing and get to work making several different prototypes to get the creative juices flowing and have fun making something they want to make, they have 2 weeks to make the chosen games. These prototypes also have the chance of becoming full games.
There were 23 protos in total but this got cut down to 5
1) hack and slash:
A young elf uses her hacking skills to cheat her way through a classic action adventure.
2) space base:
Build a space base where aliens can live and work, and watch interesting stories emerge from their simulated lives.
3) autonomous:
Lost in a new-wave futuristic junk yard world, you must build self-directed automatons from found primitives to both explore and survive the hazardous environment.
4) The white birch:
The White Birch is an ambient platform game (in the style of Ico or Journey) in which a young girl climbs a tower to escape a dark, hazardous forest.
5) black lake:
In Black Lake you track animals trough a folk tale forest and purge evil from their dreams which have spilled out into the world.
There are 9 days to go left for the bundle.... But the prototype development time finished yesterday.
Also did I mention the prototypes are out on steam?! go spend your money's!
Link to bundle
https://www.humblebundle.com/double-fineEDIT: now with better descriptions!