Gekirindan

Gekirindan is a vertical shoot-'em-up by Taito where players select one of three different fighters against an army of mechs through different time periods.

In the year 3195, a time machine is created on Earth and is promptly stolen by an unidentified mechanized being known as "Huge Boss". This evil entity uses the device to travel back in time and rewrite 3000 years of human history. The only resistance Huge Boss faces is a group of six fighter pilots from multiple eras who aim to stop him, although some of them have their own motivations other than saving mankind.