Okay! So you play in vaguely G1-ish setting where Skyfire decided he wasn't gonna be part of either side and leaves to try and find a neutral spot. Game is then more city building as he finds a planet with not sentient life and starts making it habitable.

The more habitable it gets the more other neutrals, or people who left the fractions start showing up. Eventually defenses need to be added as both other alien races and Cons and Bots do not like a third option being viable. The option for leaning more Bot or more Con is there but so is quietly convincing them to start peace talks.