Halo: Reach
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Halo: Reach

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There are a maximum of 69 Halo: Reach achievements (49 without DLC) worth 2,783 (1,700)

176,004 tracked gamers have this game, 14,505 have completed it (8.24%) | 971 want to boost

Achievement Details

A Monument to All Your Sins in Halo: Reach

A Monument to All Your Sins271 (150)

Offline Game Mode - These achievements require play in game modes that do not require a connection to any live services, such as Xbox Live.Single Player - These achievements can be obtained by a single player.Main Storyline - These achievements are gained automatically by progressing through the main game mode.Difficulty Specific - These achievements require that the game be played on a certain difficulty level. Complete each Campaign Mission on Legendary - alone.

Achievement Guide for A Monument to All Your Sins

AuthorSolution
youDOORnob
69,920 (48,205)
youDOORnob
Achievement won on 17 Sep 10
TA Score for this game: 2,095
Posted on 17 September 10 at 07:39, Edited on 30 January 11 at 22:51
This solution has 228 positive votes and 12 negative votes. Please log in to vote.
I finished this achievement but it didn't pop because, I think, I had to reload the second half of the mission and it automatically put it on normal, I restarted the mission on legendary but I guess all the messing about made it not count for some reason. so just be careful with loading your game. Anyway here are some pointers for getting through Legendary.

Note: Needler rifle or DMR, I chose DMR because when using the Needler rifle the elites roll out of the way more. (I guessed because of the super combine it counts as an explosive.). I kept both with me anyway because plasma rifles are ALL over the place so there is no point taking up a slot in your inventory, just swap and swap back saving ammo.

1. trying to force checkpoints by backtracking. It wont always work but when it does it will save time and stress.

2. Dont forget you can trade weapons with your allies, and most importantly they have unlimited ammo. so give them rocket launchers, Spartan lasers, plasma grenade launchers and they can help a lot, they take off the shields so you save ammo. They wont often finish them off so keep an eye on what there doing.

3. When you clear one area always have a look around for grenades and weapons, most of the time there will be a sniper rifle liying around, use it to clear out the next area before moving on, use up the ammo then get your DMR back (unless your a no-scoping genius, dont take it with you.) this particurlaerly helps at the end of level 7.

4. DO NOT underestimate the plasma pistol, This gun got me out of some bad situations many times. charge and hit/head shot for elites, works great on grunts if you need to save ammo, great for jackals with shields, plus they are all over the place.

5.Level 4, Nightfall. You could try this to get through the level with absolutely no big battles. Or if you don't want to miss all fights maybe just try the door glitch to avoid the hunters.


6. Level 6, at the end you will have to fight 4 elites, each with their own explosive weapon. stick to the bottom level just inside the grunts re-spawn door (don't worry none will spawn after this point) use grenades and your favoured rifle and the bubble shield as this restores health.

7. Level 7, Exodus, About half way through when your waiting for the elevator and the drop ship drops loads of brutes and 2 hammer guys. If you go through the door nearest the elevator on the same side as the drop ship you will find a machine gun this will come in handy. try to get it before the drop ship comes.

8. Level 8, New Alexandria, where you come up against 4 hunters, you can kill two from the back before going down the steps if you have enough ammo, with the 2 that are left if you go down the right (keep as far right as you can) you should be able to just slip by them easily then go back the way you came. you could probably do this without taking any of the hunters out but I didn't try that first so Im unsure.
Edit: Thanks to NoRmAlMaNzz and Violent Jay 24 for confirming you don't need to kill any of the hunters.

9. level 10, The Pillar of Autumn, Right at the start if you take cover behind the tipped up truck most of the enemies will go under the bridge this will give you time to cross the bridge for a DMR and you could just jump on the mongoose without bothering the elites.
After you clear Boneyard (this is the multilayer map name) before you go through the door, make sure you leave with a Spartan laser (with full ammo, found under the middle platform and another on the top of the middle platform.) and a long range rifle. After you go through the corridor you will come to a room with about 3 elites try not to use all you rifle ammo on them you will need at least 10-20 bullets for the next part, also don't try to shoot the 1st elite through the window because for some reason he is impossible to kill this way and you will use all your ammo trying. After this room you need to fight 2 Hunters and some little guys, this is where your Spartan laser will save you a lot of trouble. 2 hits on each Hunter will bring them down and the rifle will save you from going in the room to take out the little guys. in the room after the hunters watch out for an invisible sword wielding elite.
Then it's mostly trial and error till you get on the MAC cannon at the end for this part it is very important to prioritise. Drop ships ABOVE you are most dangerous then banshees then drop ships on level with you. they don't shoot until they get to a certain hight and shooting them unnecessarily will use up to much time, also be charging the gun as you turn don't wait to spot something.

EDIT: Matzaklr has confirmed you can actually get out and take cover behind the MAC cannon then just hop back in when the ship comes in to place, I did this the second time round on co-op and it is easy. But it's personal choice really I quite enjoyed shooting on such a big kick ass gun lol.

EDIT: iceman00behave wrote a comment with ideas to help you through Boneyard, Here is a copy and paste:
"I've got a few tips to make your life easier in the boneyard section of The Pillar of Autumn. First of all, make sure you get the drop shield and a DMR as soon as they become available, and keep the drop shield for the entire mission. When you get to the boneyard make use of the TWO lasers that are present (one on the ground found by walking to the right past the dead marine, and one upstairs to the left) to take out the 2 ghosts and the turrets. My advice would be to use one here and then take one with you for the upcoming hunter area (as youDOORnob stated). Also, there is a sniper rifle on the top level as well so make good use of that before continuing on (I used all the ammo and then picked up my DMR again). Once you clear the area, go toward the base as far left as possible. This will take you up a flight of stairs and put you on the 2nd level. When you get to the top there will be a doorway in front of you and then a doorway to the far left. Inside there is an elite on the catwalk by where you go in, an elite on the catwalk directly across from you, and 2 (i think) elites on the ground floor in the middle area along with some grunts (just to clarify, this is where the core is located on the multiplayer map). The next checkpoint is right past the door on the ground level. The trick here is to run through the door on the far left (past the elite) and then drop down behind the enemies on the ground level. Upon landing, immediately activate your bubble shield to shield you from fire and run into the doorway. Keep running straight ahead - the door will permanently close and you will get a checkpoint. This should save you some time on this particular area."

EDIT: here's a little Easter egg that will help with the long fight before the MAC cannon.



That's pretty much it. If you get stuck message me and ill tell you how I got through it, If I remember.
And remember if a girl can do it so can you =D
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