Not Receiving Achievements Upon Completion - Skyrim

Same here. Looks available for purchase still (https://www.microsoft.com/en-us/p/warframe-excalibur-outfit/g53mxxcww6hn?activetab=pivot%3Aoverviewtab)

However, I did not receive the redemption code nor the avatar upon completing that achievement in Feb 2018.

I think Skyrim for sure. The reception it received upon its making to its release, and to this day. And i think Halo (a no brainer) for sure has to hit that status.

I'd like to see the introduction of achievements having a gamer picture linked to them upon completion.

When I went for that achievement, I changed the difficulty before I spoke to Liara about it. Try that, and you should get the achievement upon completion.

I have the "A new you" achievement in Skyrim special edition at 100% but it isn't unlocking. i have completed the requirement of this achievement a couple of times already but it still isn't unlocking.