- Estimated achievement difficulty: 2/10 [Achievement Difficulty Rating]
- Offline: 39 [1000

- Online: 0
- Approximate amount of time to 1000

- Minimum number of playthroughs needed: 1
- Missable achievements: all non-story achievements are missable because there is no free roam after completing the story. Every missable achievement is tied to a case, and they are listed out in the roadmap below
- Does difficulty affect achievements: No - can play on Young Detective mode for investigating and on Easy for Combat Difficulty without impacting any achievements
- Unobtainable/glitched achievements: None
Introduction:
Welcome to Sherlock Holmes: Chapter One, a game that serves as sort of a prequel to all other Sherlock Holmes games that have been released so far, taking place during Sherlock's youth before he met John Watson and before he because the famous detective he is today. As a result, you'll be experiencing some new cases and delving into Sherlock's childhood and memories of the past that have been plaguing him. Another big difference with this game is that it is open world, so you can choose to do main cases, or break off to do side jobs and cases, explore for collectibles, etc. There is a decent amount to do, but with a guide this pretty much all becomes quick and trivial. Let's get started.
Abbreviated Walkthrough:
First off are a few important things to cover. The most important is that there is an obvious point of no return at the end of the main story, and if you want to mop up at the end of the story, make sure to make a manual save before entering the door into the garden at the back of Sherlock's house (the game will make it very clear this is a point of no return). If you don't make a manual save, you'll have no way to resume from before that point (autosaves and checkpoints will be too late).
Some other important general things to highlight before getting into each section of the roadmap:
- Since this game is open world, you can feel free to break from the main story to do side activities whenever you want. However, things only become available as you progress the main story. I therefore highly recommend you just progress the main story up until you start the final case, 'Sacrifical Lamb.' Once you start/accept that case, everything in the game becomes available for you to complete. That's the best time to stop story progression and complete all side content before finishing the story.
- Regarding the combat sections in the game, a couple things to note here.
- The outcome of the combat sections (i.e. whether you kill or arrest enemies) does NOT matter in any of the combat sections aside from a single one - in the side case 'Blindsided' in the Blind Dueling Club. There, you must arrest every enemy, but in every other one, feel free to kill or arrest enemies as you see fit. Just be aware that you get money for arresting enemies, and arresting enemies also grants you some health regen, so it's typically better to arrest when you can.
- There are a few achievements tied to combat, namely Not Up To Snuff (15G) for disorienting 10 enemies with the snuffbox, Street Sweeper (30G) for arresting 25 enemies, and Blood On Your Hands (15G) for killing 15 enemies. Once you've gotten all three of those achievements, there is no need to play combat sections anymore if you don't want to. Feel free to skip them all.
- It's impossible to make incorrect deductions in this game (in the Mind Palace menu), so it's easiest to just mash through all the possible combinations to make all the deductions.
- In most cases, the verdict you choose doesn't matter. It does matter for a couple, so refer to the roadmap below for the missable achievements in each case, but if I don't explicitly refer to a missable achievement tied to a decision on a case, choose whichever you want.
- There is no penalty for getting imagination sequences wrong (where you choose the correct sequence of events), and there is no penalty for getting the character portraits wrong. There are no achievements tied to either throughout the entire game.
The most efficient way to tackle this completion is to just stick with the main story cases until you reach the start of 'Sacrifical Lamb,' which is the last main case. This is because all of the side content (cases, collectibles, etc.) gradually become available as you progress, so rather than having to backtrack because now more stuff is available, it's far more efficient to just save it all until you're near the end of the story.
Almost every case in the game has miscellaneous missable achievements tied to it, and the main story is no different. The first and overarching case is 'A Mother's Love,' but you will be forced to break from it and do other main cases before you can continue to proceed with the main one. As far as missable achievements during the main story, this is what you should be on the lookout for:
- 'A Mother's Love' - Poor Sportsmanship (15G)
- 'Ghosts of the Past' - no missables
- 'A Mother's Love' - no missables
- 'Master of Disguise' (mandatory side case) - Mamma Mia! (15G)
- 'A Gilded Cage' - Everyone's a Critic (15G), Animal Advocate (50G)
- 'A Mother's Love' - no missables
- 'The Muse From Abroad' - Perfect Gentleman (15G), Voice of the People (30G), Short Temper (15G)
- 'A Mother's Love' - Not Now (15G)
- 'Sacrificial Lamb' - Rumour Has It... (15G), Vengeance of the Lamb (30G)
Step 2: All side content until two achievements are left
There is quite a bit of side content to do, but the majority of it is very fast, and it's all easy. It doesn't matter what order you tackle any of these items in, but like with the main cases there are missable achievements tied to many of the cases. Technically all of these achievements are missable because there's no free roam after the story, but most of these are also missable in their cases because you can't replay any cases. So here is a list of all the side content along with any associated missable achievements.
Mycroft Cases
- 'Eel Hunting' - Catch of the Day (30G)
- 'The Missing Shopkeeper' - Read It and Weep (30G)
- 'Love, Death, and Cordona' - Not Now (15G), Not His Toy (15G), Guilty! (30G) (one of three cases required)
- 'The Master of Disguise' (unavoidable case during story progression) - Mamma Mia! (15G)
- 'The Collie Shangles' - no associated achievements
- 'Splitting the Loot' - no associated achievements
- 'What was Did in the Shadows' - no associated achievements
- 'The Scapegoat' - Child's Play (30G) unlocks upon finishing all of the above cases and this one
- 'Plan Bee' - Well-Earned Rest (30G)
- 'Silence is Golden'
- 'The Hand-Me-Down'
- 'Flashes of Merriment'
- 'The Ghost-Hunter'
- 'For the Birds'
- 'A Mad Rogue'
- 'Pillar of Knives'
- 'The Tale of the Empty House' (despite being listed as a Cordona Story in the Casebook, this case is not needed for Lore Almighty (30G) for completing all Cordona Stories)
- 'Siren Song' - Curse Correction (15G)
- 'String Theory' - His First Bow (30G) (unmissable; just for completing this case)
- 'Street Magic' - Hocus-Pocus (15G)
- 'Iron Coffin' - Lawful Neutral (15G), Friends in Low Places (15G), Guilty! (30G) (one of three cases required)
- 'Blindsided' - Join The Club (15G), Open Eyes (30G), Guilty! (30G) (one of three cases required)
- 5 Bandit Lairs - Daredevil (30G)
- 24 Treasures - Gold Digger (15G)
Step 3: Finish the story
After Steps 1 and 2 are complete, you should only have two achievements left: Closing a Chapter (50G) and Becoming Sherlock Holmes (120G). Both of these unlock after completing the final bit of 'A Mother's Love.' Only once you're down to those two achievements should you proceed through the back manor door into the garden to finish the story. After all the story developments, make all the deductions and finish with whatever decision you want, completing the game and unlocking your last two achievements.
Conclusion:
Sherlock Holmes: Chapter One is definitely one of the best Sherlock games, and even one of the best detective games out there. Smooth and seamless gameplay, intuitive and easy interface and design, and nothing so missable that you require a walkthrough the entire way through the game, so feel free to try to solve the cases yourself! The open world design makes for a lot of content without being bogged down by too much. Hopefully this is the first in a line of these types of detective games!