Is it worth to buy Garry's Mod ?

I think it is if you have friends to play with. That hide and seek game is fun.

The community is kind of saturated now, unless you have a few friends who own the game there is no fun involved

It depends on the kind of games you like to play. I detest games like that, but there are lot of people that like it. If you want a multiplayer game with zero storyline that you can run around and do silly things, then it's the perfect game. xD As i2apier said, it'll probably be funnier if you'll play it with friends. And you can find it in a quite cheap price.

I dont own it but the vids of the hide and seek games on Youtuble look really fun!

if you have friends to play it with then 100%. If you dont, like me since my friends pc broke down, then it is pretty boring.

Whethever you want to partake in multiple game modes or make pictures within the sandbox with the multitude of models avaivable and even attempt at creating awesome old school gmod videos like this (please do, i love these so much!) https://www.youtube.com/watch?v=bFD98U90MEw made by one of the pironeers of gmod videos, one of the first gmodders if not THE first one who began a legendary gmod career and thus whom i consider as one of my idols, which made my childhood/teenagehood awesome, fun, funny, actiony, serious, exciting and entertaining, and ofcourse the many, many other people and their funny iconic gmod videos https://www.youtube.com/watch?v=ZdbtHApQKLQ oh how i loathe and miss, long for the good old days...then YES, absolutely YES it is worth the purchase! Wait untill its dirt cheap though, which should be around 2 euros or something with a huge discount, which have happened quite alot.

it's good for a couple of hours of fun, especially with friends. There's so many different mods to keep you busy for a while. But what I found is that most mods despite having a great concept are too limited/outdated technically to be enjoyable for a long time.

The game is discounted pretty often. I'd pick it up the next time it's 50% off

Wait for a sale! You can get it 75% off.