1. Find Counter-Strike: Source in your game list.
2. Right-click on the game and select Properties.



3. In the Properties window, go to the Betas tab.
4. Click the drop-down menu and select the previous_build.
5. Wait for Steam to download and install the older build.

1. Go to the General tab.
2. Add -game cstrike to the Launch Options.

1. In your Steam common folder, find the .exe for Counter-Strike Source.
- After installing the previous build, it will be called hl2.exe



2. Rename hl2.exe to cstrike_win64.exe

Launch the game through Steam.