The answer is METERLESS The corresponding square is FREE PARKING by Brian Tivol, Albert Lin and Ray Jones The files are all esoteric programming languages. Each program prints out a letter or a clue for that letter. When ordered by name of language, the letters spell out METERLESS. 600 befunge M 180 brainfuck E 1840 chef T 241 false E 73 malbolge R 198 piet L 194 rubeII E 1183 smurf S 132 unlambda S