all the Mercenary games, in various ways, although "cheating" is actually legitimate in them, paradoxically!
Turrican II. I got close to the end of Turrican I but the disk was corrupt
. Don't remember if I finished T3 or not.
Wizball and Wizkid.
Beneath a Steel Sky.
Got to the final stage of Dune II and my crafty strategy stopped working