I have a question ?

So I did grave mind with my friend on legendary (trying to get helioskrill) and we beat it but no achievement. It didn’t pop up but it said I beat it.
Then i did uprising by myself I found a terminal and got an achievement for that. But not beating the mission. And my progress said I didn’t beat it it’s still 10 out of 13. But when I did high charity I beat it and got an achievement .did I do something to glitch out the achievement? Also my friend put skulls on halo 3 it was 6 of them but u don’t remember then only catch. Can someone tell me if I did something wrong?

Just replay the missions. It’s just glitching…

Check your Waypoint service record to verify that every mission is complete.

It will happen from time to time, just replay the mission and hope it credits you for beating it.

I just had to re-do Regret. Great feeling that was. Played CE Legendary no problem, then came to Halo 2 legendary no problem, other than that one mission Regret.

Just re-played it and it unlocked the achievement.

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Me demora aveces Mucho Tiempo en buscar partidas en Halo alguna solucion

<mark>This post has been edited by a moderator. Because we are not currently equipped to provide moderation in other languages, we ask that all messages be posted in English. Feel free to use an online language translation service, and then create a new thread with the translated text.</mark>

Me demora aveces Mucho Tiempo en buscar partidas de Halo en solucion Alguna

Sometimes achievements don’t pop immediately, some of mine took months to unlock. P.S I finished everything on legendary, including Halo 2 and gravemind was an absolute pain solo, but isn’t it pointless getting helioskrill now that you can get it in req packs and that other variants are out. It breaks my heart to say it, but apart from the achievements and legendary status, it is meaningless in a game where everything is random.