Growing up watching Gundam, I always wanted a mobile suit RTS. There was that mod for StarCraft (Gundam Century) but it wasn't the ticket. Then Metal Fatigue came out and it was as close as you can get to a Gundam RTS. The different levels (underground, surface and sky) takes a bit of getting used to but it was real innovation back then. PLUS the playable credits! You can control the mechs in the background as the credits roll, give it a try.
