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.