I AM NOT RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOUR GAME! BEFORE YOU START! To check how much RAM you have, hit Ctrl+Alt+Del>Task Manager>Performance>Memory. Your addons could be causing this problem for you, if it persists remove them. IF THIS DOESN'T WORK! There are alternative methods below the guide you can try. Step .1 First go into steam and find Garry's Mod in your library, right click on it and find properties. Step .2 After going into properties click SET LAUNCH OPTIONS Step .3 There should now be a box that appears, to fix the LUA problem you need to type in one of the numbers corresponding to your ram. If you have 2GB of ram type in -heapsize 2097152 If you have 4GB of ram type in -heapsize 4194304 if you have 8GB of ram type in -heapsize 8388608 After the command has been input launch Garry's Mod and go onto a server (ObeyServers) the problem should be fixed. If this didn't work and you still crash, Try typing in the next lower amount of ram, for example if you have 8GB type in the one for 4GB and if you have 4 you would type in for the one with 2 Additional : 12GB OF RAM -heapsize 6291456 16GB OF RAM If you have 16GB of ram the game shouldn't be crashing, i would recommend to check your ram, the -heapsize for 16GB would be -heapsize 16777216. if you have a higher amount of ram go onto a site that can calculate gigabytes into kilobytes, you can do this buy searching up, Bit Calculator. I used the first one. https://www.google.com/search?q=bit...0j69i57j0l3.2736j1j7&sourceid=chrome&ie=UTF-8 Alternatives (DO IN ORDER) : (1) If this fix doesn't work further what I would do is Validate your Garry's mod files (Library>Right Click Gmod>Properties>Local Files>Verify integrity of game files.) this will not delete anything and will take a few minutes. (3)Try to put in the launch options "-dxlevel 98" if that does not work try 90 or 95. (LAST RESORT) Unsubscribe to all addons, then delete gmod folder and reinstall. (2) Right click the hl2.exe in garrysmod directory and run it in compatibility mode for windows 7 (If you're on W10) Set compatibility mode via the original .exe, dont be stupid.. (4)Go to your C: Drive, or whatever drive you have Steam Installed on. Open it up. Go to Program Files>Steam>Steamapps>common>garrysmod Click on FactoryReset-Gmod A command prompt will open. To continue with resetting your game, you have to type Y to say yes. What this will do is reset your game to the base factory settings. (Reinstalling your game will not do this, this is why i recommend this over reinstalling your game.) ^^^ THIS WILL MEAN YOU HAVE TO DOWNLOAD OBEYSERVERS CONTENT AGAIN ALONG WITH ANYTHING THAT MIGHT BE REMOVED. Why addons could be causing this problem : "some addons written send a massive table to the player on join. This table got bigger the more the player played, so I found out about it because my more dedicated members were the ones with the issue. I suggest investigating addons that involve building up data over long periods of time like car dealers or things with inventories." THE SERVER YOU ARE JOINING COULD ALSO BE CAUSING THIS PROBLEM. I AM NOT RESPONSIBLE FOR ANYTHING THAT HAPPENS TO YOUR GAME!