Sonic Legacy was a fan-made game collection celebrating the 25th anniversary of Sonic the Hedgehog. It included HD remasters of classic titles such as Sonic Adventure, Sonic Adventure 2, Sonic Heroes, Sonic the Hedgehog (2006), Sonic Free Riders, and Sonic Boom: Rise of Lyric. The game also features bonus content like playable Amy and Knuckles in Sonic CD, and special stages from Sonic 3 and Knuckles in Sonic 2.