To be honest, with ATOW and the ATOW you have all the rules you need, from getting into a simple firefight or bar brawl, to piloting a BattleMech in a war zone, to robbing a bank or running your own planetary domain. With the Era Reports and Era Digest you can create characters from the Age of War to the Dark Age/ilKhan Eras. I just wish you can set up PCs quickly and you could play online easy with it. I ran a one-shot with Mechwarrior Destiny with some friends. Character creation was easy, but the PCs felt a little bland and samey to me. ATOW PCs are more fleshed out, which is to my liking. But you cannot really whip up characters quickly unless you really know the the universe (and Excel).