Transformice!

[sifira]

While I usually hate browser games, this one's really funny. As per vg cats:

Basically you play as a giant team of mice that have to work together in order to get cheese. Your foe? The human condition.

http://www.transformice.com/en/index.html

[neon.Barnacle]

I went to a lan party the other day and we played this for 2 hours straight. It's great all by itself, and even more hilarious when the players are sitting right next to you.

Be warned though, I've seen lots of R-rated comments in the chat box.

[Quinn]

I've seen lots of R-rated comments in the chat box.
sounds like my kinda game ;)