BattleTech! That's the one. Didn't know they made an RPG out of it.
Firefly is an out of print Cortex Plus game by Margaret Weis Productions. It's in the list as well as Serenity (the Cortex Classic game by MWP, isn't IP licensing fun?).
Rifts is a classic, but also a very strange animal. And for some reason I thought Robotech was a minis game (must be confusing with something else).
Star Wars is already listed. I know those are technically different games, but I'm trying to keep the list as concise as possible (grouping the multiple versions of the same setting under one entry). I don't know much about the history of star wars RPG though. How would you summarize it? (WEG d6, d20, Fate)?
Done and thank you!