I see that PS Xbox 360 and PSvita is not support for the moment
You could open a new thread asking for this, we here are just also users helping each other. :)
In the future did you propose to merge the same game on different store/support
for exemple i have For Honnor on PC PS4 and xbox one I see 3 game en my game list but it's the same ...
it will be interesting to compare archivement on different suport for the same game, not on different pages
The 'merging' game has been discussed quite a bit... there are other threads you could find. But there are issues either way... first: how do you define the 'primary' store/launcher for the merged game? Then, in other cases, like adding games manually, then you have the reverse problem: you can only add the game once. Anyway, lots of stuff for GOG to think about and implement. I'm sure they are looking around for opinions. :)