A Line of High-Performance Eggrobos. The most notable being E-100 ZERO -The main antagonist of Amy's Story in Sonic Adventure, E-102 Gamma - An E-100 robot with a very bittersweet and touching story that'll make you cry, and E-123 Omega, A notable member of Team Dark. Alongside Rouge and Shadow.
E-100 Series? They just pulled that idea from the Terminator series. Classic Sega - Sega Fan