I did career mode the rapid way... 6 hour rl missions and unlocked the tree. That was kind of a let down, and I did it to myself! So I am about to start over and I wanted to do it more realistically this time. I was wondering if anyone has come up with a check list? 1) Sub orbital flight 2) low orbital flight 3) Orbital flight 4) Probe orbital flight to mun and return 5) Kerbaled flight to mun, orbital, return 6) Kerbaled flight to mun, landing, return, repeat several times 7) probe flight to minmus and return? 8) Kerbaled flight to minmus, land and return That is as far as I have gotten with a logical order. I would guess probe flights to other planets would be next. Anyone interested in helping come up with a check list and science goals, as in the science number? Scout