Surprisingly few licensed game franchises can claim to be as old as Mobile Suit Gundam, and fewer still can claim to have the legacy that Gundam does.
Gundam, if you didn't know, is almost as old as home gaming itself. Bandai's seminal robot anime first found popularity in the early 1980s, when the Famicom was also finding its feet, and has been a big part of gaming ever since. True, you don't see a lot of Gundam games in the U.S.; but over in Japan, Bandai (and later Namco Bandai) has released one or two Gundam games per year since at least 1986. That's a lot of Gundam.