And yes, osu!'s chat is done through a custom made IRC server, for lack of a better term. You can connect to it from IRC clients, not just in-game.
300 300 300 300 300 X 300 Esc Retry.
[18:22] <BanchoBot> Saturos has moved up to place #0 in the top 10! [02:40] <awpkun> I love suckin' ass~
[01:19] <Rolled> maaaaan luigi im sucking 6 in a row here
2019 edit: For those of you who still look at my profile for whatever reason, yes I'm alive. Also yes, I played mouse and left click only.