There was a lot of potential for the Heavy Gear series as a RPG setting. Even the characters listed in the core books had a novel "chess piece" system to show how important they might be to future books (so GMs wouldn't get them killed off or otherwise changed too much if they were too important for future canon plots) which made me expect a vast post-interpolar war story spanning the terran colonies on the scale of Legend of the Galactic Heroes, or at least Gundam.

That didn't happen because Heavy Gear became "Clix'd" and sort of abandoned any attempt at a long-running ongoing story, so it was up to me to fill in the blanks for as long as my tabletop group wanted to play.