Sega and Humble Bundle are working together to provide a whole load of Sonic The Hedgehog games in a special Sonic 25th Anniversary Humble Bundle.
The bundle contains Steam keys for many of the classic Sonic games, with the first tier costing just $1 and including Sonic the Hedgehog, Sonic Adventure DX, Sonic 3D Blast, Sonic CD , Sonic Comic sample)
If you beat the Average (currently $7.20) then you can also get Steam keys for Sonic the Hedgehog 4 – Episode I, Sonic & SEGA All-Stars Racing, Sonic the Hedgehog 2, Sonic Adventure 2 + Battle DLC
Paying more than $10 nets you even more Sonic goodness, with Sonic Lost World, Sonic Generations + Casino Nights DLC, Sonic the Hedgehog 4 – Episode II, Sonic & All-Stars Racing Transformed + all DLC
Finally, a Special Sonic T-Shirt will be yours to celebrate the anniversary if you pay $35 or more.
Humble Bundles raise money for great charities, and you can choose where your money goes between the developers, and charities: Child’s Play, SpecialEffect, U.S. Fund for Unicef, and the World Wildlife Foundation.
You can grab a Sonic 25th Humble Bundle here.