Halo 2 PC Achievement issue

first off al i dont know if i am posting in the right section, so if its wrong sorry about that.

now i have an issue with some achievements for Halo 2 PC , i contacted xbox support and they told me to go post in the forums.

so my issue:

i played halo 2 pc and completed the campaign on normal, and the achievement did not pop, so i decided to try and complete it on legendary, which i did and again no achievements unlocked.

so i searched and found out the achievements are buggy and doing everytime again can fix it, did that multiple times and didnt work.

then i decided to download an achievement unlocker to kinda help the game (which i know is not allowed by xblive rules but in my opinion if you met the requirements and because of bugs you dont get your achievement you can once go again those rules, i do
not like hacking because i want to work for it and unlock it in a genuine way)

sso i started that program and unlocked my buggy achievement, and switched to the game to see it alsmost crash en unlock all locked achievements for halo 2 pc at the same time (all achievements i am talking about are unlocked at 14 July 2014 at 20:42
so they are old but i forgot about them)

os my question is can those achievements be locked again (obvioulsy then i would like to be able to get them again, and i know multiplayer is gone to those are gone which i am okay with, and i only want the singeplayer ones)

:)

 

Windows 10 achievements not unlocking

HI

I'm having an issue with achievements not unlocking for PC games. I finished Halo Wars 2 yesterday and not a single achievement has unlocked. I was signed into my xbox profile in game and I was online so I'm guessing its not a synch issue. I have also had
an achievement not unlock in Fallout Shelter so I know its not just Halo Wars.

Thanks

 

Halo 2 (PC)

Yes, there is still online support.

Yes, there are achievements.
Here is the list of achievements.