E-102 Gamma

E-102 Gamma (ガンマ, Ganma ?) is one of the E-100 series robots created by Dr. Eggman. In Sonic Adventure, he is given the mission to collect Chaos Emeralds for Chaos after defeating E-101 Beta (ベータ, Bēta ?). After witnessing the fate of Beta, Gamma slowly develops a conscience unique to the other E Series, releasing Amy Rose in remorse. After some convincing from his new friend, Gamma decides to turn against Eggman, to "rescue" the other E-Series robots, E-103 Delta (デルタ, Deruta ?), E-104 Epsilon (イプシロン, Ipushiron ?) and E-105 Zeta (ゼータ , Zēta ?) , by defeating them and releasing the small animals used to power them. He eventually battles and defeats an upgraded Beta, which leaves Gamma mortally wounded. They both end up destroyed, which releases two related Flickies that join with the other Flicky under the care of Amy Rose. He reappears as a playable character in Sonic Shuffle after being "revived with the power of dreams", and as a remodeled, playable fighter in Sonic Battle.

His gameplay in Sonic Adventure has been criticized by IGN for slowing down the pace of an otherwise mostly fast-paced game.[45