There have been a few Gundam tabletop games, but they were all fan based and non gained any traction other than in trading the gasaphons. There IS an SF3D boardgame, which is now only available in PDF, and at one time there was a video game that was loosely based on it called Terra Nova: Strike Force Centauri but they radically changed it after the licence falling through.
I bet you (ok, some one who can program…) could do a Steel Panthers conversion for the SF3D board game! Anybody know anyone?
"I saw this in a cartoon once, but I'm pretty sure I can do it..."