I already own the Unreal Anthology, which as you all probably know includes all of the Unreal games (except UT3 of course, which I have as well). I love GOG.com and was wondering if I should think about buying this at some point in time. Is it worth it if I already own the Anthology?

Do the original games work for you in XP/Vista without having to change a million settings? Then no. Why buy something again if the original discs work just fine. Then again, it's your money...

On the other hand, the GOG version is immune to scratches :P

Also, the GOG.com version is prone to receiving bonus material. It may never actually happen, but the possibility is there.

Nope, my original copies work just fine. Though its good to know that I have this option if something ever happens to it.