Gmod To Play

Video tutorial

Today i went to play Gmod, but when i enter on some map, the chat start a countdown and then gmod close, also the addon gave me a link to a server but they didnt said what addon is breaking the game, anyone know about which addon is?
Garry's Mod, also known as GMod, is a physics-based sandbox game using Valve's Source Engine, which was developed by Garry Newman as a mod to Half-Life 2. GMod requires that you own at least one Source Engine game, such as Half-Life 2, in order to play it. However, you are limited to the props available in the Source Engine games you own, so.
I bought Gmod a month ago or so but only played it now. I find it really hard. I have no idea what any buttons do or how to do anything at all. Like, I saw videos where people were playing and using helicopters, SCP's, Etc. I searched for hours and couldn't find out how. I tried multiplayer serves and they were ok I guess.

Gmod Sandbox - is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

Open the GarrysMod directory by right-clicking Garry’s mod in Steam -> Properties -> Local files -> Browse game files…
Right-click hl2.exe and click Create shortcut. Rename the shortcut if you want.
Right-click the new shortcut and select properties.
At the end of Target, add -windowed -w 1920 -h 500 -insecure +m_rawinput 1
- This is for a 1920x1080 monitor. You can adjust the width/height for your monitor.
- The -insecure will prevent you from joining any Valve Anti Cheat (VAC) secured servers. You can remove it if you want, but it is risky.
Launch the shortcut as many times as you need.
- Source Engine games will usually not let you launch more than one instance. In Universal Split Screen, alt-tab into Garry’s Mod so the window is selected, then click ‘Unlock Source engine for a new instance’
Click Start new game. Change Single Player to however many players you need. Make sure Local Server is checked. You can set the map/gamemode as you like. Click Start Game.
On the other instances, go to Find Multiplayer Game -> Local Network and join the server.

If you have inconsistent mouse movement, especially when moving multiple mice, make sure the polling rates on your mice are set as low as possible. You can usually set this in your mouse configuration program (look on the manufacturer’s website).
Disable steam overlay by right-clicking Garry’s Mod in Steam -> Properties and un-check ‘Enable the Steam Overlay while in-game’
If you want to start and stop split screen, you should restart all instances of the game or it will start to slow down significantly.

Open Universal Split Screen
In options, load the Source Engine preset (if you have not already done so).
Go back to the Current window tab. Alt+tab into the first instance. Set the mouse and keyboard or controller. Repeat for the other instances.
Click Start split screen. You should now be able to play. Press End to stop.

For reference, here are the default options.