For CS2, if you want to inject a DLL into the game, you first need to add the
-allow_third_party_software launch option. This allows third-party software to interact with and inject code into cs2.exe.
When it comes to standard DLL injection, this is one of the most basic methods on Windows involves using the LoadLibrary function and creating a new thread inside the target process. For DLL injection, I would recommend Extreme Injector.
How to run CS2 with
-allow_third_party_software
1. In Steam, go to Library, then press left button mouse on game e.g. cs2, and click on "Properties..."
2. Then go to the "General" and look for "LAUNCH OPTIONS"
3. In the text box provide launch option e.g...
"
-insecure" will disable VAC anti-cheat, but then you can't connect to VAC secured servers.
"
-allow_third_party_software" will allow to use standard injection to inject unsigned DLLs files to game.
Also we can connect these arguments, by adding extra space between arguments e.g. "-insecure -allow_third_party_software"
Here game will be...
Extreme dll injector:
About Extreme Injector:
- Have alot of options.
- Working for all games.
- Super easy to use.
VirusTotal.com Link:
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Analyze suspicious files to detect types of malware.
Screenshot:

For more information and related tools, you can also check out or for a guide
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.