I made a topic about this a while ago, but i have NO CLUE where it went...
I LOVE garrys mod, it is so amazing the endless capabilities of it. I don't have garrys mod, but I play it at my friends house all the time. Have you explored wire mod much? do you know how to use it?
Garry's Mod is a modification using the Half-Life 2 and Counter-Strike: Source engine. It is pretty much a total sandbox game where you can build anything with all of the newest game's sprites and more. It is available through Steam or the official GMod site. It uses a special weapons (The physics gun) and a spawning device to allow users to create many things, the site promotes it with a picture of GMan riding in a custom built Bath Tub Car. A multitude of special tools help also, welding to nail gun to remover. To current version, GMod 10, is priced at $10, and can be priced to $5 if bought in a pack through Steam. There is GMod 9 out for free, but it doesn't come with updates and it is incompatible with multiplayer.
I only have 9 but in my opinion it's a good game. I play it sometimes, so the free version was good enough for me. If you really like it (I suggest downloading the free version first) then delete GMod 9 and buy GMod 10 and go with that.
Requirements - Half-Life 2 (No exceptions! Not even another Source based game.)
LOL DUDE I LOVE GARRYS MOD. My friend and like 40 other people made a working Transformer robot on there. I made a huge fortress that couldn't fit on my entire screen!N XD