Overview:
- Estimated achievement difficulty: 4/10 [Achievement Difficulty Rating]
- Offline: 50 [1000]
- Online: 0
- Approximate amount of time to 1000: 100-150 hours [Estimated Time to 100%]
- Minimum number of playthroughs needed: 1
- Missable achievements: None [open world/free roam]
- Does difficulty affect achievements: No [can choose all of the easiest settings when starting a new game]
- Unobtainable/glitched achievements: Many of the achievements are glitchy, as of the time of writing this guide. See below
 

• DLC: Wrath of the Druids
  • Difficulty: 5/10
  • Time to 210: 5-8 Hours
  • Unobtainable: None

• DLC: Mastery Challenge
  • Difficulty: 7/10
  • Time to 40: 2-5 Hours
  • Unobtainable: None

• DLC: The Siege of Paris
  • Difficulty: 4/10
  • Time to 260: 5-8 Hours
  • Unobtainable: None

• DLC: Tombs of the Fallen
  • Difficulty: 2/10
  • Time to 20: 45-60 minutes
  • Unobtainable: None

• DLC: Dawn of Ragnarok
  • Difficulty: 3/10
  • Time to 260: 15-20 hours
  • Unobtainable: None

• DLC: Mastery Challenge 2
  • Difficulty: 5/10
  • Time to 30: 3-5 hours
  • Unobtainable: One of the challenges for this DLC has a game-breaking bug that will make the achievement unobtainable. Read the roadmap or achievement solution for information on how to avoid it until it's patched.

• DLC: The Forgotten Saga
  • Difficulty: 5/10
  • Time to 260: 8-10+ hours
  • Unobtainable: None

• DLC: Tombs of the Fallen, Part 2: Buried Knowledge
  • Difficulty: 2/10
  • Time to 30: 2-3 hours
  • Unobtainable: None

Introduction:
Welcome to Assassin's Creed Valhalla, the third entry in the series since the new form the series has taken. This entry sees you playing as Eivor, a Norse viking in the 6th century AD, during the time when vikings were sailing to England to invade and take over. If you've played Origins and/or Odyssey, Valhalla will feel very familiar, with some new features. The story has been designed into multiple story arcs instead of one story and many side quests, gear is now all unique with special attributes, the skill tree is vast and varied, and the combat has some new features to it as well. The achievement list for this game will also be familiar to those who have played the previous two entries: you'll need to complete the story arcs, kill all members of the Order of the Ancients, complete all "collectibles" on all of the maps, and mop up a bunch of miscellaneous achievements. There is a lot to do in this game, so depending on your pace and efficiency, you're looking at a solid 100 hours, minimum, for the completion, but you can likely expect more. Let's get started.
 
Note on glitchy achievements: Unfortunately, there have been many reports about many different achievements simply not unlocking or stopping tracking. There are also many reports of World Events not completing, NPCs not acting properly, quests not progressing, etc. The most common fixes are, first, to reload a previous save. The game auto-saves regularly, so loading the previous auto-save will only set you back a minute or two, at most. Doing this takes care of the majority of the bugs and glitches, thankfully. If that doesn't work, try quitting and restarting the game. And if that doesn't work, try a hard reset and clearing your cache. If none of those work, you will likely end up waiting for a patch.
 
Abbreviated Walkthrough:
As noted in the Overview, when you start a new game, feel free to choose all of the easiest difficulty settings. Difficulty has no bearing on any achievements (not even Overdesign II (30G) despite its description). Likewise for whichever gender you decide to choose.
 
Like many Assassin's Creed games, there is a lot to do on the map. There are wealth to find (yellow dots), mysteries to complete (blue dots), and artifacts to find (white dots). For the completion, be aware that you'll need to complete everything on the map in all regions of the game. Nothing is missable though, so feel free to tackle the story, collectibles, and anything else in whatever order and pace you prefer. Despite the events of the story, all areas can be returned to and all collectibles can be gotten after finishing the story. There are a few things to be aware of up front:
 

• As noted in the Completionist All the Way! (30G) achievement solution and above, there have been multiple reports of mysteries, wealth, and artifacts not counting/completing properly when you collect/finish one. Because of this, I highly recommend keeping an eye on the lower right corner of the screen whenever you complete anything on the map to ensure it checks off a box that it's been done. If not, you should immediately reload you previous autosave before completing it and try again, as this will resolve the majority of these types of bugs.
• Upon arriving in England, I highly recommend heading to Walden in Grantebridgescire to obtain the Book of Knowledge there, giving you the Incendiary Powder Trap ability. This ability is extremely useful, as it can be used to blow up the destuctible rock walls that otherwise can only be broken with a red explosive vase. These vases can be a pain to track down and carry to the correct location at times, and this ability eliminates the need to ever look for a vase again.
• Also after arriving in England, I highly recommend heading to the Isle of Ely Monastery and getting the Book of Knowledge there, giving you the Dive of the Valkyries ability. This ability lets you destroy the bar on barred doors by attacking the door with the ability from the front, eliminating the need to find a way to destroy the bar.
• Every time you do a raid to collect the Cargo chests, also make sure to loot all regular (non-Cargo) chests around the abbey/monastery. The reason for this is because doing every single raid in the game still won't give you enough Supplies to build everything in your settlement. The regular chests in abbeys and monasteries also give you some Supplies, which will cut down on the hunt for more Supplies later in the game.
• The maximum power level is level 400. Reaching level 400 gives you enough skill points to fill the entire skill tree (all nodes and skills). As a result, you can choose which things you prefer early in the game, but know that you'll eventually have everything. Also be aware that you can respec any/all of your skill points at any time, as many times as you want, for zero cost. So don't hesitate to move around the skill tree to see what's available, and if you don't like what you find, remove those skill points and spec in a different direction.
• DO NOT sell any fish that you kill/catch. There are a few altars (required for the completion) that require you to offer specific fish, and having to recatch ones you sold will be very tedious. Specifically, you will need 20 small bullhead and 5 small brown trout.
• On the same note, there is an altar that requires you to offer 5 fabric, which is also needed for the completion. Once you start obtaining fabric from chests, I highly recommend keeping 5 in your inventory at all times so you have it available when you reach the applicable altar.
• On your travels, specifically at night, keep an eye out for a firefly. They are small glowing balls that can be found randomly around England. When near one, you will get a prompt to press  to catch it. One is needed for the Twinkle Twinkle (10G) achievement, and since their spawning is random, it's best to be alert for one as you go to save yourself time later.
• Before you surpass power level 300, get the Overdesign II (30G) achievement out of the way. While it's possible after that, you'll save yourself the hassle of removing upwards of 100 skill points by taking care of it before you pass level 300. Refer to the achievement solution for where to get it.

With all of that out of the way, you're set to play through the game. Feel free to play any mix of story quests, collectibles, and whatever else you'd like to do. Completing the story quests and doing a minimal number of map items is enough to keep you at a high enough level to continue progressing through the story, if you prefer to do that first. There is quite a bit to do on the map, and it can be overwhelming at first. For the completion, here is what you need to complete:
 

• Collect all wealth (deep yellow dots), complete all mysteries (blue dots), and collect/complete all artifacts (white dots) on the map for all five locations. This includes England, Norway, Vinland, and two others that I won't mention here to avoid spoilers.
• Complete all raids in England.
• Complete all pledges on the Alliance Map in your settlement.
• Build every single building in your settlement. 
• Build the Hidden Ones Bureau, and follow the questline to travel to Vinland.
• Build the Museum, and return all Roman masks to the proprietor.
• Build the Seer's Hut and follow the storyline given by Valka to its end.
• Kill all Zealots and Order members.

With that said, there are in fact some things that you don't need to worry about, in terms of unlocking all achievements:
 

• None of the questlines from the settlers in your settlement are required. These include the one for talking to Randvi about Grantebridge and taking her there, the quest from Tove, the quest from Tekla, and the quest from Gunnar, among others. These offer only some more character development, and of course some XP, but you'll get far more XP than you need from everything else you need to do for achievements, so feel free to ignore these questlines if you desire.
• In general, you do not need to find and loot all of the regular chests on the map, which are indicated by faint yellow dots. However, I highly recommend reading through the Home Sweet Home (30G) achievement solution to ensure that you do loot the regular chests in abbeys, monasteries, and villages/towns to ensure you maximize your Supplies you collect and reduce the need to hunt them down later.
• Viewpoints technically do not need to be synchronized for any achievements, surprisingly. While they do reveal dots on your map, so does being within 500-600m of them. Like all games in the series though, they offer fast travel points which are huge time savers. Because of that, it's still in your best interest to sync all viewpoints.
• You will often come across wandering NPCs with a question mark above their heads. Talking to them and paying them a bit of silver reveals an unmarked collectible on your map. In general, you don't really need to worry about interacting with these NPCs at all, as syncing viewpoints and traveling around the map for other collectibles will reveal just about every collectible anyway.

That should sum everything up. Complete the story, kill all Order members, complete all collectibles on all maps, and then mop up any miscellaneous achievements you're still missing. Refer to the guide below for the best place to obtain each one.
 
The Wrath of the Druids DLC adds a new area (Ireland) and a new story quest, mysteries, treasures, and artifacts to complete/collect. It plays very similarly to the main game, so you should have no issue jumping in and getting these new achievements done.
 
The Mastery Challenge DLC adds a new side quest and 15 new mastery challenges to complete. These are replayable challenges that will test your melee, ranged, and stealth skills. You will need to perfect these challenges to earn all the gold medals, unlocking the A True Master (30G) achievement and an interesting story cutscene that hints at future content to come!
  
The Siege of Paris DLC adds a new area (Francia) and a new story quest, mysteries, treasures, and artifacts to complete/collect. It plays very similarly to the main game; however, with the added addition of black box quests. These play similarly to Unity's system, where you have multiple options to eliminate targets and truly feel like an assassin again. Otherwise, you should have no issue jumping in and earning the 260!
  
This latest title update adds new content in the form of puzzle tombs, akin to those in the Tomb Raider series: mini dungeons whose challenge is solving puzzles mixed with some minor platforming to open the tomb at the end to gain access to the loot. Unfortunately, none of this content is marked on the map, given with a quest, etc., meaning you're meant to track everything down manually. Even starting this content can be tough to do unless you know exactly where to look. I have described how to start this DLC in the "Spelunker" achievement solution. Once you start the DLC and complete the first short introductory tomb (which is when "Spelunker" unlocks), you'll reach a giant stone slab inside this tomb, and Eivor will comment on it being a map of England. This rudimentary map shows you the locations of the other three Tombs, but unfortunately there is no way to have their locations marked on your map. The locations are detailed in "Crypt-ologist" along with details on how to complete each.
 
Two important notes:
 

1. You only need to complete two more tombs of these three to complete the final achievement in this title update. However, there is a high likelihood that all will need to be completed for a future update.
2. A tomb is considered completed when you loot the chest at the end with the gear inside. HOWEVER, there is a hidden tomb fragment at the end of each tomb. Again, while these fragments aren't required for any achievements in this title update, there is a high likelihood they will be needed to open a door in a future update. To avoid the need to backtrack to and through these tombs later, ensure that you also collect the tomb fragment before leaving each tomb.

 
Upon loading your game after installing this DLC, you'll be given a new mission in Ravensthorpe, 'Restless Dreams.' Follow this through an intro mission to this DLC. When done, you'll have access to the brand new region Svartalfheim, the Dwarven realm being overtaken by Surtr and his legion of Muspels. Like the base game, you'll have new territories with the usual open world activities to complete for each region. Each territory also has a story arc to follow and complete to finish the story. Lastly is a new mechanic added to this DLC: the Huge-Rip. This lets you extract Hugr from slain enemies (and other sources) to use toward five new abilities. Completing the story missions and clearing your map of all activities will net you almost every achievement. Refer to See No Evil (20G) to make sure you grab that one, since its requirements are a bit finicky. Also, make sure to read through the requirements to fully upgrade the Hugr-Rip in Hugr Incarnate (40G) since there's a bit more to it than originally appears. Lastly, if you get stuck during any open world events, refer to Over the Hills… (40G) for some tips on the trickier ones. 
 
WARNING: There is a challenge-breaking bug associated with the Trial of the Raven in Anderitum Hideout in Suthsexe. The key you need to loot from the fourth guard you encounter is only available during your first attempt at this challenge. In all subsequent attempts, he has no key, and it's therefore impossible to complete the challenge. You therefore need to make a manual save before attempting this challenge so you can reload it if/when you fail to get gold on this challenge.
 
This title update DLC picks up where the first Mastery Challenge title update left off. Head back to Ravensthorpe, and be aware that if you left the game immediately after obtaining A True Master (30G), you will still need to finish the quest from the first Mastery Challenge update. Look for and track 'The Cryptic Tutelage of Hildiran' from the first DLC in Ravensthorpe, and return to Hildiran to turn it in if you haven't already. With that quest completed, you'll get a new one, called 'The All-Seeing Eye,' in Ravensthorpe. Accept it to get a quest marker in East Anglia. Head to the marker and go all the way to the east coast of the area with the quest marker, down to shore where the boat is, and you'll have a stone ramp near you to walk up to a breakable (explosive) wall. Blow open the wall and fall the short linear path to a door you can interact with for a cutscene. This adds three new Mastery Challenge locations to your map (one in southeast Suthsexe, one in southeast Lincolnscire, and one in northwest Hamptonscire). For the completion, you'll naturally need a gold medal on each of the nine new challenges (the achievement guide has more detail and tips on this). Once you've completed those nine, you'll have a new objective to return to the same door in East Anglia. Do so, and you'll have a boss fight. This is a straightforward fight since there is no way to fail (other than dying, of course), so just fight your way through all the enemies in each phase. Once the boss is defeated, straight ahead in the corner of the room you're in is a final shrine with three more challenges. You now need to obtain a gold medal on each of these three challenges to finish off this DLC and unlock its only achievement. Again, refer to the guide for more information on these challenges.
This free update adds a brand new game mode, called The Forgotten Saga. It is a roguelite game mode that takes place in Niflheim. To access it, head to Ravensthorpe and you'll automatically have a quest entry available title The Forgotten Saga, to speak to a new guy in town. Follow the short string of objectives to jump right into this new mode. It should be stated that, like all roguelite games, the difficulty is at its highest when you first start, since you haven't unlocked any upgrades or permanent perks, plus you don't know the enemies and bosses yet. So don't be discouraged by your first run, as it gets noticeably easier and more manageable as you unlock skills in the skill tree. I've provided much more guidance in The Queen's Fall (20G) for how to get through the DLC and beat it. The two hardest achievements are Pure of Heart (40G) and Sacrificial Victory (40G), so refer to those for additional tips. The rest of the achievements are miscellaneous ones that you can work on whenever, but know that Freedom Fighter (40G) involves side quests that require multiple runs, so it's best to start on them immediately. Not only that, but the reward for the first of those side quests is one of the most useful in the DLC, so I highly recommend knocking out that side quest immediately. Everything else is easy enough to achieve, especially after a run or two so you are more comfortable and know how this DLC plays.
 
The second half of the Tombs of the Fallen content (which is also free, like the first) brings two new tombs to complete. Just like with the three tombs from the first half, there is no associated quest or marker on your map, so you're expected to find these tombs manually. I've provided screenshots in the guide to help you locate them quickly. The two new tombs are both relatively simple puzzle tombs, on par with the first three, making them pretty easy to complete even without a guide. While you only needed to complete two of the three tombs in the first half of the content, you'll need to complete all three and the two new ones for this half.  As expected, and as I mentioned in the roadmap and guide for the first half of this content, the tomb artifacts that can be found at the end of each tomb are now required to complete this second half. So, hopefully you heeded my advice and made sure to collect them at the end of the first two/three tombs, and of course make sure to do the same for these two new ones. With all five tomb fragments collected, you can return to Manius's Sanctum (right across the river from Ravensthorpe) and return to the large stone slab from the beginning of the first half. This will open up another, final tomb, that you'll need to complete a pretty long series of reflected light puzzles. Once you reach the item in the center of this tomb, you'll finally complete this DLC and unlock the only achievement.

Overall Conclusion:
Despite the multitude of bugs and various issues the game has, the gameplay is a ton of fun and the story is enjoyable to follow. Eivor is a likeable character, and there are many good characters that you meet along the way, forming relationships with. The combat feels intense and brutal, like it should when playing as a viking. While one could easily argue this isn't much of an "Assassin's Creed" game and more of just a viking game, it's still a great entry in the series, with solid gameplay and a solid story. The achievement list, while a bit daunting at first glance, isn't particularly difficult and is just a bit time consuming to clear your map. That should be familiar to many fans of the series though, so don't let that stop you from picking up this game.