No, but not all combinations work.
gg + gg works, and retail + gg as well.
For other digital downloaders, you'd better check with them.
Gamersgate does not alter their version, but others might do that, and then the gg expansions will not work anyway.
gg + gg works, and retail + gg as well.
For other digital downloaders, you'd better check with them.
Gamersgate does not alter their version, but others might do that, and then the gg expansions will not work anyway.