DISCLAIMER WORKS ONLY ON A LEGIT COPY FOR THE ONLINE TO WORK, Also recommended for better stability.

1. Install bottles ( https://usebottles.com/ ) and install windows steam through it
2. Login and install your css copy
3. After install direct yourself to steamapps folder and go to sourcemods. Extract your "csso" folder from https://www.moddb.com/mods/counter-strike-source-offensive
4. Go back to steamapps and go to common and cs source , place the bin from rar inside and replace all.
5. Restart bottle instance completely
6. Boot into the steam inside the bottle instance again.
7. You will find counter strike source offensive.
8. Type ` -insecure ` in the prelaunch commands and enjoy playing csso on linux
Tested on linux mint latest.
Runs full speed on a gtx 1650 on high settings capped at 144)