Super Robot Wars Alpha Gaiden

Super Robot Wars Alpha Gaiden (スーパーロボット大戦α外伝, Sūpā Robotto Taisen Arufa Gaiden), or simply, Alpha Gaiden, is a video game for the PlayStation, first released in Japan in 2001. It is the first side-story in the Super Robot Wars Alpha series, continuing from Super Robot Wars Alpha. The characters of After War Gundam X, Turn A Gundam, and Combat Mecha Xabungle make debut appearances in the game.