What video game has caused you to bust the most nuts?

I'm talking rule 34 content, mods, and games designed to be used as wank material.

I'd say mine is Hotel Harem. It's a lewd game that's still in development that has been around for a while.

I was struggling to think of what specific character I've masturbated to the most but then I realized it's definitely Tifa Lockhart despite me never playing Final Fantasy VII.