Garry's Mod

Hell yeah. I'm sure alot of you have heard of Gmod.
If not, go google it.
If so, do you have it?
Discuss C:

Would it be worth it to buy?
Which source should I get if I buy it?

Would it be worth it to buy?
Which source should I get if I buy it?

I'd get it with TF2, the models are fun, and it's only 10 dollars. Plus, mods, sweps, maps and texture packs are free to DL.

Don't have GMod, but I could get it once I reinstall L4D2 I think.