I am looking for a new game!

Hmm,both of them are good,haha! I would recommend Garry's mod unless you have a drawing tablet for OSU.

i reccomend hellblade - senuas sacrefice. it is a story driven game but it gets under your skin after a while and i had to play it in 1 sitting. :D

i love garrys mod its fun to play with a group of friends

If you like MOBAs check out Battlerite. It will go F2P in November but it's worth paying the $20 since you'll get all champs and all future champs.

If you're stuck between Garrys Mod or OSU. I'd suggest Garrys Mod personally.

But really, you should pick whichever one you want to.

I don't see the appeal in gmod. You have to pay 10 dollars and make up your own experience. If you want to do the games youve seen (ttt, rp, deathrun, prophunt) then yeah get it

Osu is a free to play game. I don't see why you shouldn't get it if you are into dance dance revolution, or Stepmania. Sure there's the weeb shit but there are also edm songs that aren't fully "oriwan oniichan"

That's a fair point. And I wasn't aware Osu is free. If you're into that type of games, there's really no downside into giving it a try at least.

IMHO Garry's mod is the go-to. There are a lot of different gamemodes like DarkRP, Prop hunt, etc. and it's pretty cheap if you know where to get it.
On the other hand, OSU is a pretty nice game, but unappealing to me.

I've been playing Osu for 3+ years. It's such a great game. You do need to get a tablet though. But they're not that expensive and you can also use it for drawing if you're into that also.