I've found one where you tie a balloon to everyone's ankle and you have to try and pop everyone else's balloon
which I thought sounded fun. And our living room is big enough that people don't have to play if they don't want to.

I'm going to create a den type thing in one corner where people can sit and chat if they want, away from all the frivolity.

If you type 'halloween adult games' into google it brings up hundreds of "charades, but Halloween themed!" or "pictionary but Halloween themed!" which is just lame. I want silly games that won't get boring and can be played by as few or as many as want to.
( Kitty v1.0 desperately naive, Tue 31 Aug 2010, 14:31, 2 replies, latest was 16 years ago)

that is actually surprisingly fun
the balloon game.
( Amberl was stripey and dominated Europe, Tue 31 Aug 2010, 14:33, Reply)

the independent did an little supplement thing
on party games just before we did our party, we got lots from there, I don't have it any more, though. The gingerbread thing was a challenge to make a gingerbread man of the character you had come as. Points for the best ones.
( Citizen Cavy Admires your passion for conformity, Tue 31 Aug 2010, 14:34, Reply)

you could do that one with straws and peas
where you have to suck them up from one bowl and drop them in another.

or the 'pass the balloon from using your knees' game
( Citizen Cavy Admires your passion for conformity, Tue 31 Aug 2010, 14:36, Reply)