Super Robot Taisen Alpha for Dreamcast

In the year New AD 179, an enormous alien spacecraft crash-lands on Earth, making humanity acutely aware that they are not alone in the universe. The ship is repaired and its technology reverse-engineered, becoming the flagship SDF Macross in preparation of an attack on Earth. Just eight years later, their worst fears come to reality, with the Neo Zeon Army launching an all-out attack on Earth.

Résumé

Super Robot Taisen Alpha for Dreamcast is a strategy simlulation game for Dreamcast, released on 2001. The game is an extended port of Super Robot Taisen Alpha with changes in the system, including an overall 3D transition, more titles in the game, and the ability to use coalescing attacks.