GTA:SA has no online by default, and the multiplayer mod isn't compatible with the Steam version I'm pretty sure.
San Andreas Multiplayer works fine for me and I have the Steam version.
I'd prefer having it on steam instead of walking to the store and stuffs. :c
I might get SA too. :/
btw SAMP is just pure epic, well at least back then it was good, with there city RPs :) and a bunch of other crap. I don't know how SAMP is now, haven't checked it out recently. :(
install Multi Theft Auto. Sa-mp is inferior in almost literally every way.