The Outer Worlds

Edit: AbsolutioN IX & FayMoon have pointed out in the comments you can unlock this achievement and "Monarch Abides" in a single playthrough with a carefully timed manual save.

Also, for this achievement, you will need to make sure you complete the optional opjectives "wipe the terminals" for Sanjar and choose food supplies / save the Van Noys (Graham / Zora), during their respective quests.

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The following solution was taken from PowerPyx's trophy guide - full credit to PowerPyx.

This trophy and Monarch Abides are mutually exclusive, you can’t do them both in the same playthrough without using save backups.

For this trophy after you’ve stopped the radio transmissions and got the info sent to Phineas or talked Hiram into working for the board a UDL ship will crash into the planet. Go get the targeting module, then you need to talk Sanjar and Zora into working with each other for their own best interests.

To have the Iconoclasts agree you need to have Zora overthrow Graham. To allow this to happen in the two prior quests you do for the Iconoclasts you need to side with what Zora wants, getting the extra food supplies from the smuggler, then getting the Twins back from the press instead of having them go in and help you. After that once you have got the targeting module you can speak to her again and she’ll ask you to get some mission logs, which leads to the discovery that Graham orchestrated the pirate attacks. You then need to agree with her to overthrow Graham and kill him. You can then talk Zora into potentially working with Sanjar if you have 55 Persuasion, or other skills around that level.

Sanjar can then be talked into working with Zora if you find her report from the Rizzo’s Lab in the same area you get the items for Sublight. You then talk them into meeting at the OSI church just outside the city, where you can basically give mostly neutral and encouraging answers to have them talk it out and agree to work together. Once they do you’ll complete the quest and earn this trophy.

- These are 2 different MISSABLE "Story Options" which you CAN acquire in the same play-through making the right decisions and using Saves.
MONARCH ABIDES is easy to acquire where PEACE IN OUR TIME takes quite a few certain decisions needing to be made that are easily missable!! Follow this guide to make sure you get both w/o having to do multiple play-throughs!
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*This WILL include some spoilers although I leave out most of the details, but if you don't at least read this ahead of time you are bound to miss the Peace In Our Time Achievement / Trophy

- These one's are a bit later in the story after you get to Monarch.
For Mightier Than The Sword (secret) & Monarch Abides (secret) you have to make decisions early in the story to obtain, so go to the guide there to avoid missing those.
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------> STAGE 1 | "Radio Free Monarch" <------

*For PEACE IN OUR TIME you must complete these [optional] quests during the "Radio Free Monarch" Main Quest to get Zora involved and to be able to use a peaceful [option] during the quest "Canid's Cradle":
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During "The Commuter" [Iconoclasts - Graham/Zora] :
- "Get Extra Supplies from Carlotta"
(for Zora instead of High-Capacity Cartridges for Graham)
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During "Pay for the Printer" [Iconoclasts - Graham/Zora] :
- "Retrieve Zora's Team (Van Noys)"
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During "BOLT with His Name" [MSI - Sanjar] :
- "Wipe Any Terminals in the Building"
(located in the 1st floor of the ARMS building, underneath the objective)
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------> STAGE 2 | "Canid's Cradle" <------

After you get the targeting module from the fallen ship you may only have the 2 options for the "Canid's Cradle" quest, giving the module to either of the 2 faction leaders. SAVE HERE!!
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} Give targeting Module to Sanjar, Graham, or Zora  and win the war for Monarch Abides *THEN RE-LOAD SAVE and continue w/ the peaceful solution
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To acquire Peace In Our Time you must talk to Zora @ Amber Heights in the building to the right of the one Graham chills in.
- She will ask you to do a small quest, once finished she will "need some time" before making a decision. (Can probably just fast travel somewhere and come back)
- I completed a side-quest and came back to her hangin' out on the 1st floor. Go up to her to have a convo, be on her side and end up taking out Graham.
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***NOW instead of giving the Targeting Module to Zora or Sanjar, CONVINCE Zora to work with Sanjar, which will unlock the 3rd [option] that is basically to bring peace b/w MSI & Iconoclasts. Continue with Canid's Cradle quest AVOIDING GIVING THE MODULE TO EITHER ONE

Completing the small quest Sanjar gives you sets up a Negotiation b/w Zora & Sanjar. Simply go to the Church, SAVE to be safe, and complete the negotiation to acquire Peace In Our Time !!!!
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Doing this stops you from having to do a new play-through! :)

All of my HD Achievement Guides for The Outer Worlds can be found here! :) (Mobile Friendly)
https://www.bradleafsfan9.com/the-outer-worlds

Before you finish the Radio Monarch mission, a Faction quest called Canid's Cradle will be activated

, once with the module in your possession choose how to proceed.
Here you must make a save to get both achievements.

To get Monarch Abides achievement, you will have two options to deliver the module to Sanjar or Graham, once you choose,


For the achievement Peace In Our Time, you must make
, once the conversation is over you will get the achievement.

This missable achievement is unlocked when, during the faction quest, Canid’s Cradle, you broker peace between the two opposed factions. The achievement is missable. First, you are not obliged to accept the Canid's Cradle faction quest. Second, even if you do, you are not required to broker peace. You can, instead, side with either faction and defeat the other by killing its leader. Doing so, unlocks the mutually exclusive:

Although this achievement and Monarch Abides are mutually exclusive, you can make a save before the deciding point. After you unlock the first achievement, you can load the save and pop the other.

Whereas this achievement is unlocked during Canid’s Cradle, it requires specific optional choices be made in earlier quests. During BOLT with his Name, you must read Sanjar's reviews and then delete them.

During the quests, The Commuter and Pay for the Printer, you must choose to acquiesce to Zora's requests rather than comply with Graham's directions. This entails getting extra food & supplies and saving the twins. Zora will then give you an additional quest, Sucker's Bait. Accept it and complete it by going to the Abandoned Relay Station and providing Zora with an Old Data Cartridge you find there.

You must also get Zora's reviews from Rizzo's secret lab in Cascadia. This does not have to be done beforehand (although it makes matters more convenient later). If you don't, Sanjar, will explicitly ask for them as part of the Canid’s Cradle quest.

The game plays differently depending on how you respond to a decision on Groundbreaker. If you decline to turn Phineas in to the Board, you embark on the Phineas path. If you report him to the Board, you embark on the Halcyon path. During Radio Free Monarch (Phineas Path) or Signal Point in Space (Halcyon path), you persuade the two factions in conflict to stop their broadcasts and unlock:

Immediately following that, the faction quest, Canid’s Cradle becomes available. If you choose to accept the quest (you are not obliged to), you recover a targeting module sought after by both factions. Once the targeting module comes in to your possession, two mutually exclusive courses of action become available. Each results in an achievement. If you want to get both in the same playthrough, make a save once you gain custody of the module.

If you want to get the good ending in the game, work towards Monarch Abides first. Once you unlock it, load the save you made upon acquiring the targeting module.

Providing you complied with the prerequisites during Bolt with his Name, the Commuter, & Pay for the Printer and complete Sucker's Bait; you have the wherewithal to broker peace. Help Zora overthrow Graham & kill him. Then, Persuade her with a skill check of around 55 to work with Sanjar to their mutual benefit.

Next, go to Sanjar. You can persuade him to negotiate by discussing Zora's review. If you have not already found it, you will have to go to Rizzo's secret lab in Cascadia and read it on the terminal. You'll have a quest marker to assist you. Once Sanjar agrees to negotiate, go to the OSI Church just outside Stellar Bay and talk with Zora and Sanjar selecting the positive dialog choices on every occasion. Make sure you state that Sanjar was not culpable in any of Graham's misconduct. The achievement unlocks when the negotiation successfully concludes.