games you can get achievement from on xbox one game pass

is that because there are sometimes connectivity issues that prevent your console from communicating with the Xbox live server? I theorized that this could be my issue considering my internet is provided by my apartment complex and my network settings on my Xbox say I have a double NAT. As much as I love these AC games and I want to complete them all 100 percent and get all of the achievements, it worries me that I could have some achievements randomly not unlock for some unknown reason. Then, just for the hell of it I figured I might as well try to get the other two remaining achievements so I started a new save again on my original gamertag, played DNA sequences 1-10 and guess what.? They both unlocked on a second playthrough! I even saved all my money and after completing DNA sequence 10 I went to the tailor and the blacksmith with the intention of buying all the armor, pouches, and weapons and I came up short on a few items, but as soon as I exited the blacksmith menu, the achievement for getting all the items and upgrades popped! There seems to be no rhyme or reason to any of this and it's extremely frustrating.

So I went back to my original gamertag and played through DNA sequence 1 on that account and it didn't unlock. I played through DNA sequence 1 all over again on a new save file, under a different gamertag, on the same Xbox console and it unlocked just fine. By the time I finished AC 2 to 100 percent completion, I was missing three achievements: one for completing DNA sequence 1 (literally the first segment of the game, so that makes no sense), DNA sequence 10 (also random since there are 14 total sequences in the game so obviously I would've completed sequence 10), and the one for unlocking all weapons/items.

Games you can get achievement from on xbox one game pass