Over here you can download all the Content and the game itself, everything that's needed for you to own is noted in all the downloads
Garry's Mod 12 (Reboxed)
WARNING! You need to own Garry's Mod on Steam! in order to play this version!
The Most Used and the Most Stable version, the perfected version... now with ToyBox!
NOTE: People are still migrating to this version, so don't expect good support yet!
How to install?
1. Have either 7-zip, Win-RAR, or any other 7z-compatible archive extractor
2. Download Reboxed Garry's Mod 12
3. Extract gmod12-reboxed.7z anywhere(yes, anywhere), it does NOT go in sourcemods
4. Ensure Steam is running and is in online mode
5. Right click Patch Hosts (Run as Administrator).bat and select Run as Administrator. The opened window will close immediately after, you only need to do this once.
6. Create a shortcut to hl2.exe, add the following in the end of the Target field, BUT DO NOT REMOVE ANYTHING:
"-game garrysmod -steam"
You can change the icon to anything by pressing "Change Icon" and finding the .ico or .exe you want to switch the icon to.
Garry's Mod 12 (SourceMod)
WARNING! You need to own Garry's Mod on Steam! in order to play this version AND have Source SDK Base 2007 installed!
The Most Used and the Most Stable version, the perfected version
Garry's Mod 12 (Standalone)
WARNING! This version is known to be the most unstable and not that many people can help you with any isuses that rise up, but it's also the most up-to-date version of Garry's Mod 12(e.g. Left 4 Dead 1 and 2 half-arsed support and different loading screen + some changes), you also need to own Garry's Mod on Steam in order to play it.
The way it's meant to be played.
Garry's Mod 11 (SourceMod)
WARNING! You need to own Garry's Mod on Steam! in order to play this version AND have Source SDK Base 2006 installed!
The Most Used and the Most Stable version, the perfected version
Game Content
WARNING! In order to be able to mount the game content, you must own the games on Steam
Here is all of the game content that's required to be able to mount
How to install??!
1. Download the content you want
2. Make sure it's named correctly (e.g. cstrike, episodic, etc)
3. Extract in Source SDK Base 2007(or 2006/main folder of the game(BEFORE garrysmod) depending on the version you have installed)
PLEASE MAKE SURE YOU EXTRACT THESE ARCHIVES AND NAME THEM CORRECTLY! Many people accidentally extract it either in the /hl2 folder or /garrysmod or god knows where, so please, extract and name them correctly!
- hl1(126M, GDrive)
- hl1dm(2.9M, GDrive)
- episodic(588M, GDrive)
- ep2(1.2G, GDrive)
- lostcoast(128M, MediaFire)
- portal(383M, GDrive)
- cstrike(669M, GDrive)
- dod(326M, MEGA)
- tf(2.14G, MediaFire)
Garry's Mod 10 (SourceMod)
WARNING! You need to own Garry's Mod on Steam! in order to play this version AND have Source SDK Base 2006 installed!
The original Steam version from 2006, now in SourceMod form!
Garry's Mod 10 Beta
WARNING! In order to play the SourceMod version you need to own Garry's Mod on Steam! AND have Source SDK Base 2006 installed! It's also very unstable since its an unofficial port, you're better off with the Standalone version..
The Standalone version was found in a Russian Repack that has addons and maps, don't worry, it has no viruses, used it myself, you need to have "-game garrysmod10beta -Steam -appid 4000" in your launch parameter and also own Garry's Mod to start up.
The Garry's Mod Beta from 2006