Haven't played in ages though. I don't know how to navigate the horrible jumbled mess of servers, and I don't have anyone to play it with, so I've never really tried to hard I guess lol
It's kinda like, you know how some games allow you to mod it and add skins and levels and stuff? GMod is like that except that you're adding the gameplay/mode itself
Oh, I think I've seen a video of prop hunt -- that's where it's like a junkyard and one team is the supposedly-inanimate objects and the other team has to track them down?