I was halfway through a thread when the list started spiking — achievement names, AppIDs, and game handles spilling out faster than anyone could verify. For a few minutes it felt like watching a cracked dam spill secrets across every indie tracker and Discord. I want to walk you through what leaked, why it matters, and which names you should treat as whispers, not press releases.
Read this as if I’m sitting beside you, scrolling through the same feed: I’ll point out what’s solid, what’s probably placeholder, and where Valve and publishers need to answer questions.
What is the Steam Achievement Leak?
You may have seen achievement trackers suddenly list private sets for unreleased games — that’s the anomaly in plain sight.
The short version: Steam’s API exposed private achievement data and Exophase, an achievement-tracking service, picked up those records. Exophase owner Mike Bendel and other observers described the incident as a Valve-side screw-up that allowed unreleased or private achievement entries to be readable via the API.
The leak wasn’t an inside break-in; it was a backend permission error that let third-party services scan and display entries marked private. That exposed early development strings, placeholder names, and — in some cases — clearly final-sounding achievements.
What is the Steam achievement leak?
It’s the accidental publication of achievement metadata via Steam’s public API. Services like Exophase index achievements; when the API returned private entries, those services reflected them publicly.
List of All Games Revealed in Steam Achievement Leaks
Open forums and trackers looked like a scavenger market — clipped names, mysterious AppIDs, and a lot of guessing.
Below is the running list that communities have compiled from those leaked achievement records. Treat it as a living document: some entries are obvious titles, others are placeholders or internal codenames. I’m leaving the list intact so you can scan for familiar franchises and oddities.
- 4Loop
- ACE COMBAT 8
- AKIBA LOST
- ALF game
- Attack on Titan 3
- Avengers game (Unannounced)
- Brawl Stars game (Unannounced)
- Brazilian Drug Dealer 4
- Candy Crush title (Unannounced)
- Clive Barker’s Hellraiser: Revival
- Clutch
- Control Resonant
- Crazy Taxi: World Tour
- CRYMELIGHT
- Custom Hobo
- Danganronpa 2X2
- Deus Ex Remaster (Unannounced)
- Disney/Pixar Toy Story: Retro Roundup! + Toy Story 3 Complete Edition
- Dragon Ball Xenoverse 3
- Dragon Quest Monsters: The Withered World
- Dune game (Unannounced)
- Dynasty Warriors 3 Complete Remastered
- EDEN.schemata();
- Fable
- Fate/Extra Record
- FINAL FANTASY RESONANCE
- Gears of War: E-Day
- Grave Seasons
- Gundam Rogue Orbit
- Guns of Eschaton
- Heroes of Newerth (Unannounced)
- HoloTrials
- Horizon Hunters Gathering
- Judas
- Kena: Scars of Kosmora
- Kingdom Hearts IV
- Last Epoch
- Magicians: The Devil’s Deal
- Mega Man: Dual Override
- Metal Max 2 Reloaded
- Metro 2039
- Minecraft Dungeons 2
- Nickelodeon life-sim Animal Crossing-esque game (Unannounced)
- Penis Bird
- Persona 4 Revival
- Persona 6
- PGA Tour 2K27
- Professor Layton and the New World
- PUBG DED.NET
- Raiden Fighters Collection (Unannounced)
- Rayman Origins
- Remothered: Red Nun’s Legacy
- Restitched
- Road Kings
- Shrek 2 Remaster (Unannounced)
- Silent Hill: Townfall
- Sin Reloaded (Unannounced)
- Slime Rancher game (Unannounced)
- Squadron 42
- Star Trek: Outposts
- Star Wars: Galactic Racers
- Stellaris game (Unannounced)
- Stranger Than Heaven
- Stupid Never Dies
- Stuntman: Hollywood
- Thief: The Dark Project
- Toem 2 (Unannounced)
- Tomb Raider: Legacy of Atlantis
- Touhou Koumakyou
- Trails in the Sky 2nd Chapter
- Trine 6: Together in Time
- Tropico 7 (Unannounced)
- Turok Origins
- Twin Peaks game (Unannounced)
- UNDEFEATED: Genesis
- Uta Macross
- Valor Mortis
- Walking Dead Collection (Unannounced)
- Wardogs
- Warrior Cats: Clans of the Forest
- Warhammer game #1
- Warhammer game #2
- Warhammer Survivors
- Witchbrook
That list is expanding as researchers and dataminers chase AppIDs. Some entries are studio-confirmed projects, others are likely cancelled work-in-progress strings that leaked by accident.
What Does the Steam Achievement Leak Mean for Upcoming Games?
On social feeds you’ll already see fans guessing story beats from a single achievement name — that reaction tells you what’s at stake.
Achievements are breadcrumbs that trace a game’s map: a single line can hint at a boss, a location, or a mid-game twist. For narrative-driven franchises such as Persona and Kingdom Hearts, achievement strings that mention characters or places can spoil big reveals long before a trailer drops.
Are the leaked Steam achievements final?
No. Developers can add, rename, or remove achievements through production. Some entries in the leak are incomplete or clearly placeholders — but others read like final design notes, and companies may not be able to scrub every reference from public APIs without effort.
What you should expect: publishers can change names and drop achievements, but the exposure of major project names or broad gameplay systems is the real harm — PR timelines and staged reveals have been compromised.
What Does the Achievement Leak Mean for Steam as a Platform?
On any given day Steam’s API is powering leaderboards, overlays, and tools — that everyday flow is how the hole happened.
This incident raises questions about access control and how private development metadata is marked in Valve’s systems. Exophase didn’t hack a protected database; it simply read what the API returned. That suggests a permissions or rollout error on Valve’s side rather than malicious scraping.
For publishers, the worry is clear: will private staging data remain private? For players, the worry is whether surprises will continue to be coordinated by developers or become an accidental drip feed via open APIs.
Are the Leaked Steam Achievements Final?
You’ll find people treating the list like a patch notes leak — that’s optimistic for accuracy.
Leaked achievements are development artifacts. They can be deleted, renamed, or abandoned. Some entries in the current cache clearly contain placeholders or test strings; others may represent finished design checks. Use the leaked names as indicators of scope, not as guarantees of content.
What are the major games revealed in the Steam achievement leak?
The leak includes a mix of major franchises and obscure projects. Notable names that appear in public listings include Persona 6, Persona 4 Revival, Kingdom Hearts IV, Gears of War: E-Day, Dragon Ball Xenoverse 3, Control Resonant, Silent Hill: Townfall, Ace Combat 8, Tomb Raider: Legacy of Atlantis, Minecraft Dungeons 2, and Stranger Than Heaven.
If you track industry feeds — Twitter/X, ResetEra, Exophase, GitHub-style datamine threads — you’ll see AppIDs and proof screenshots appear, but tread carefully: not every string maps to an actual release.
The leak is a reminder that metadata is sensitive. It’s also a warning: private entries in public APIs are low-friction spoilers and a headache for PR teams. I’ll keep updating this list as new AppIDs surface and as publishers confirm or deny entries. What do you think Valve and publishers should do to prevent the next accidental reveal?