Enable mod command?

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Hello,

I can't find the command to enable a mod, can it be enabled from the console or with a startup parameter? I mean it is possible to enable a mod without having that buggy Steam installed?

Thanks for your time.

 

[Insano]

How are you going to start up HL2 without Steam?

 

[Pi Mu Rho]

I think what he means is "that legitimate version-checking Steam installed"