Warcraft III
I mean playing Pudge wars with a bunch of friends 5am probably made me laugh
more than I have ever laughed in all other games combined.
And that's only 1 mod.
Single player games don't really make me laugh at all. Tho I find laughing alone awkward
anyway, but I can't think of a game that made me laugh in single player mode. Maybe skyrim
with it's thousand bugs and physics caused a few smirks.