Update: 4 new games unlocked.
A cracking new Humble Indie Bundle, pretty much all great games.
From $1 you get:
- Little Inferno
- Awesomenauts
- Awesomenauts Cluck Costume
- Capsized
- Thomas was Alone
- Dear Esther
Pay above the average (currently $5.68; may change in the future) and in addition to the above games, you'll also get:
- Hotline Miami
- Proteus
- Tiny & Big in Grandpa's Leftovers
- Intrusion 2
- English Country Tune
- Oil Rush
All games are Steam redeemable
Hotline Miami is definitely worth paying above the average.