Skyfox (Mac OS Classic)
"Enemy tanks are attacking homebase, sky-pilot! It's time to put the Skyfox to the test!"
A snippet of assembly code is found at the end of sector 63.
JSR Init JSR ProtFound MOVE.L D0,-20(A6) TST.L -20(A6) BEQ
Since there's no Finder or MiniFinder in which to see it, the developers never gave the disk a proper name. Instead, the title
Xelok 2 sig is left over from the third-party copy protection system they used.