@evan Off the top of my head:

Myst, Riven, Myst III
Zork: Nemesis
At least a couple of the Civs and Sim Cities (well, no, I've won several times, but not in all civs and all difficulties, etc...)
Diablo, Diablo II, Torchlight 2
Talos Principel
Fez, I think?
One of those Indiana Jones point and click games, I think?
A short hike and a few other smaller games like that

And aaalmost The Witness. That was like 99%.

Probably forgotten some.