G.I. Joe
I have the core book from Renegade Games, but I honestly like Savage Worlds a little bit better. If you look, you can find good GI Joe Content online for Savaged Worlds, and it's better than the Official GI Joe Roleaying Game, in my opinion.
I have soloed some GI Joe stuff using Savage Worlds. I created a Joe named Private Parts for that one. It was a fun project. I have ran a couple of sessions for other people, but that quickly turned into everyone wanting to play Snake Eyes. So, I turned it into a Gi Joe squad game.
If you plan on running a Gi Joe campaign, expect something like that