I'm just tinkering around right now, learning the game, but I'd like to actually kind of follow the history of spaceflight up through and beyond the modern era. Start with probes, then manned subballistic, then manned orbit, then Mun / Minmus landing, first deep space probes and probes to other planets, then shuttle program and space station and Kubble, on to manned flights to the other planets and hell hopefully someday interstellar flights? Campaign mode cannot get here soon enough