If you want a more modernized experience with server browsers and custom mods, many players use the client.

Modifying game files can sometimes lead to instability. Additionally, the native PC version of Black Ops 1 is notorious for having an unstable split-screen implementation (players often experience low frame rates or crashes). For the best modern experience, many PC users prefer the "Redacted" or "Plutonium" client mods, but this guide focuses on the standard Steam version using official methods.

If Nucleus Coop fails to start the game, try running the NucleusCoop.exe as an Administrator. Additionally, disable the Steam Overlay, as it can interfere with the way Nucleus hooks into the game files.

seta cl_maxPing "100" seta scr_game_allow_join_during_match "1" seta party_enable "1" seta party_minplayers "1" seta party_maxplayers "2" seta scr_game_allow_join_during_match "1"