A7 can be used for RTS games, currently the team i work for is creating a multiplayer rts/fps, and its working fairly well. If you have experience writing dll's that's even more power to you, and will probably even more likely make your experience using this engine as pleasurable as writing a game can be :P for example our game uses a custom networking dll since the a7 multiplayer is not quite adequate for a commercial rts game (in our opinion).