Kemény actively encouraged games on the DTSS platform, and considered it to be one of the major reasons for the success of the DTSS system. He was likely the author of an early mainframe game. Although Kemény did not take credit for it, he later referred to "FTBALL" by stating it "was written on Sunday after a certain Dartmouth-Princeton game in 1965 when Dartmouth won the Lambert trophy. It’s sort of a commemorative program". The game was an upset over heavily favored Princeton.