Loderunner on an XT class computer (Score 1)

Somebody at work pirated a copy of Loderunner on a 5.25 floppy disk, and it ran fine on all of our two-floppy-disk PCs. It would not run on my Compaq Portable Plus, with its 10 MByte hard disk. For a while I resorted to opening the computer up and unseating the hard drive controller card in order to be able to play the game, but that got old (and I was afraid I would eventually break something). I used debug to figure out where the boot code on the Loderunner disk was going wrong, and made myself a patched copy of the game disk. That was my first hack, and still one of my favorites.