http://www.reddit.com/r/KerbalSpaceProgram/comments/2q6urw/found_a_way_to_cheat_that_needs_fixing/ So last night I was playing career mode and from the building where you can opt into strategies for money, exp, science etc. I chose the one that would take some money and return some science. Then in the available contracts I was able to accept the high paying ones (thus getting the advance of money and now some science) and subsequently cancel the contract. Money never goes into the negatives and the science 'advance' is never revoked. I was able to do this over and over, racking up science without doing anything. Then when I had my fill of science I simply accepted the contracts I wanted, thus going from $0 to whatever I got from them for an advance and voila, continued on my merry way with new parts for free. This should be fixed by allowing negative money essentially making it possible to 'bankrupt' your space center and making the current game unplayable.