Diablo 1 is a classic but it's disapointing to me that the GoG version loses battle.net functionality and all it adds is resolution upscaling. I really wish they'd have added the ability to play Nightmare or Hell difficulty in singleplayer. Especially since B.Net isn't available in the GoG version it would make a lot of sense to allow these in singleplayer now. It would have been a 4 star if they somehow had been able to work with Blizzard to integrate the new version into battle.net.