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Halo Reach: Campaign

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Halo Reach: Campaign

A Monument To All Your Sins achievement in Halo MCC

A Monument To All Your Sins

Halo: Reach: Complete every level of the game on Legendary difficulty, by yourself.

A Monument To All Your Sins0
3 guidesOffline Game ModeSingle PlayerMain StorylineDifficulty SpecificStackable

How to unlock the A Monument To All Your Sins achievement

  • LifeExpectancyLifeExpectancy1,647,891
    05 Dec 2019 10 Dec 2019 22 Dec 2019
    21 2 4
    I've made a new solo legendary vid for TMCC, with data pad locations pointed out (usually just via text), misc achievement reminders (like the easter egg ones), and tips here and there. It is designed to be approachable so there are no crazy speedrunner skips or despawns except for the gate glitch on Nightfall since it's easy. Some parts are sped up for brevity but it shows more or less my path through the game.



    OR if you wanna take the easy route, see my LASO solution. Save/quit at the end of each mission then load up the non-modded PC version or XB1 version to complete the mission for credit.

    Guide not helping? View 2 more guides for this achievement.

    Showing most recent comments. View all comments.
    melbufrauma@ShonicTH yeah I have had to replay several levels 2-3 times before it finally registers my save during missions end CS.
    Posted by melbufrauma on 17 Dec 19 at 07:17
    Maverick HiroI've done it with no mods through the Legendary playlist (so to get 1 out of the 3 required) and every mission counted and had it's achievement unlock with no issues.

    But i do remember that in past MCC titles, if you saved and quit on the very last loaded portion of the mission (ex: the fight against Prophet of Regret) and loaded it again, the timer would freak out and the mission wouldn't count. I don't know if this was patched but maybe it's the same with Reach?
    Posted by Maverick Hiro on 19 Dec 19 at 20:21
    ATCSHeads up to anyone doing this in 2021, but you can use Rally points and still get the achievement. I used Rally point Charlie for all levels and the achievement popped without issue.
    Posted by ATCS on 10 Aug at 03:31
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  • IFreeMzIFreeMz200,597
    22 Dec 2019 25 Dec 2019
    10 1 0
    Here's a full guide for this achievement using some decent strats for the PC MCC version of Reach that worked quite well for me. The video includes all of the cutscenes but the in game time is around 2 hours 11 minutes. I hope it helps some of you out.

  • SilverScorpion4SilverScorpion4119,815
    10 Dec 2019 31 Dec 2019
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