Does this have to be played thru Gog? I just got a new pc with win10 and says incompatible. Got base game and 2 expacs thru amazon, anyway to fix this?

You mean Galaxy, not "Gog". No, it does not have to be played through Galaxy. Please supply more data, ie. what do you mean when you say "says incompatible"? Are you talking about trying to install the game or Galaxy?

mine's also a new computer with windows 10 and i play through galaxy, so it should work

galaxy is installed, and thats what the msg says that its incompatible. I dont have any option to play offline, all the options are greyed out after it failed, nm and thx, will try again tomorrow and if that doesnt work theres plenty to do in Unreal.