Steam are doing an incredible deal(s) at the moment with 50 of the top Greenlight games up for sale at upto 75% off the usual price! This is Steam's celebration to the 1 year of Greenlight with the community picking 260 games to be added to the Steam list. The deals last right upto the 2nd of September, so now is the time to grab a Bargain of some truly epic Indie games.
Steam Link : http://store.steampowered.com/sale/greenlightsale?snr=1_41_4__42