The Humble Weekly bundle is a seriously cheap PC games deal regardless of what tier you buy in on, with highlights including Superfrog HD and pretty much all the Worms ever.
As a die-hard Amiga fanboy, I naturally grew up with Team 17, so this bundle makes me rather nostalgic even if it contains the new rubbish Alien Breed, not the awesome original one. To recap: pay what you want for Worms Armageddon. Worms Blast, Worms Ultimate Mayhem, Worms Pinball, Worms Crazy Golf, Superfrog HD and the new Alien Breed Trilogy.
Beat £3.83 to also receive Worms Revolution Gold, Worms Reloaded GOTY, Overruled and Light, or throw down £9.50 for sheep-tastic puzzler Flocker and a Clan Wars 4-pack. Personally I feel that the base tier brings the best value, but let us know what you're buying. Thanks to jaystan @ HUKD!