Giant Guardian Generation: The Mecha Genre Roleplaying Game

User summary: Humanity is locked into competition over the exploitation of Gygravagnite, a newly-discovered, and highly unpredictable, energy source. Mecha are common and space combat appears unavoidable. As things approach a crisis, an alien race appears to complicate the situation - spreading destruction and claiming sovereignty. The game often is considered a tabletop adaptation of the Super Robot Wars series of video games.