The game has 23 Steam achievements and 25 Xbox achievements (1,000 Gamerscore). Many overlap. Several are secret/story-related and will unlock naturally as you progress. Others require optional investigations, collectibles, and thorough exploration. Difficulty does not appear to affect unlocks.
Estimated time for 100%: Main story is ~8–12 hours. Full completion (all optional cases, crates, broadcasts, talents) is closer to 15–18+ hours depending on thoroughness.
Achievement List (Xbox / General)
| Achievement | Description | GS | Notes / How to Unlock |
|---|---|---|---|
| Welcome To Arkham! | Secret | 25 | Story-related (early progress) |
| Soulmates | Secret | 25 | Story-related |
| Bodysnatchers | Secret | 40 | Story-related |
| Bigger Fish To Fry | Secret | 40 | Story-related |
| Timeless Dawn | Secret | 50 | Story-related / likely ending or major milestone |
| Out Of Your Shell | Secret | 40 | Story-related |
| Fast Friends | Secret | 40 | Story-related |
| We Aim To Please | Secret | 40 | Story-related |
| A Blast From The Past | Secret | 40 | Story-related |
| Sterilizer | Secret | 50 | Story-related |
| The Inheritance | Investigate the wall safe | 40 | Optional investigation – find and open a specific wall safe |
| The Other Gods | Investigate the church mystery | 40 | Redemption Church side content (detailed below) |
| The Red Press | Investigate the cursed press | 40 | Collect Printing Plates A/B/C and solve the press puzzle |
| The Siren’s Call | Investigate the alluring song | 40 | Related to Lorelei / Devil’s Reef Hotel section |
| The Whisperers | Investigate the machine connected to the brains | 40 | Optional investigation involving a brain machine |
| The Vault | Investigate the locked storage | 40 | Optional investigation |
| The Drowned | Investigate the mysterious locker | 40 | Optional investigation |
| The Damned | Investigate the sixteen punishments | 40 | Optional investigation (likely involves Roman numerals I–XVI) |
| Mycophile | Listen to every Mushroom Jack broadcast in one playthrough | 50 | Collectible – listen to all radio broadcasts from Mushroom Jack |
| From Oblivion Read | Secret | 50 | Story-related or major collectible |
| Behind Every Crate Man… | Unlock every Emergency Relief Crate in one playthrough (excluding DLC) | 50 | Find and open all ERC crates using Activator Pens/Handles |
| What Dreams Are Made Of | Obtain all Talents | 50 | Collect all Sleep/Dream Essences and unlock every talent |
| For Her | Unlock all achievements/trophies | 90 | Platinum-style – earn every other achievement |
Key Optional Achievements – How to Unlock
The Other Gods
Complete the Redemption Church mystery:
- Get the Church Key and enter.
- Obtain the Star Key.
- Use it on the upper-floor power room (get the Trident) and the crypt (get Printing Plate C + document with entity marks).
- Solve the backyard obelisk puzzle with the correct symbols (snake, crooked cross, spear, etc.).
- Charge the Trident with lightning, return it, insert the dagger into the altar, defeat the monster in the secret area, and collect the Dream Essence.
The Red Press
- Collect all three Printing Plates (A, B, and C – one is in the church crypt).
- Take them to the printing house (accessed via the cemetery gate after getting the Cemetery Key).
- Install the plates in the secret room and flip them until all are gold (each plate flips adjacent ones).
- Print the image to unlock the achievement + a shotgun upgrade.
Behind Every Crate Man…
- Find ERC (Emergency Relief) Crates throughout the game.
- You need ERC Activator Pens/Handles (found in various locations, including near safe rooms and story areas) to open them.
- Open every one in a single playthrough (DLC crates excluded).
Mycophile
- Listen to every Mushroom Jack radio broadcast. These are scattered around Arkham – keep an ear out and interact with radios when you hear them.
What Dreams Are Made Of
- Collect all Dream/Sleep Essences (rewards from optional content, ERC crates, and side mysteries).
- Spend them at talent stations (often in safe rooms) to unlock every talent. Only equipped talents are active.
Tips for 100%
- Optional investigations never gate the main story but are required for several achievements and better rewards (upgrades, safer routes, inventory expansions).
- Explore thoroughly — rooms turn blue on the map when fully looted.
- Safe rooms let you store items and save; use them to manage inventory while hunting crates and collectibles.
- Many side achievements (church, printing press, safes, lockers) can be done as soon as the relevant area opens.
- Secret/story achievements should pop automatically if you finish the campaign.
- Play on a comfortable difficulty — combat and resource management are the main challenges, not the trophies themselves.
As more full guides drop in the coming days (game launched today), exact locations for every broadcast, crate, and remaining secret will become clearer. For now, prioritize the named optional investigations listed above while progressing the story, and you should be well on your way to “For Her.”
Good luck surviving Arkham.
