- Update Notice - SEP 12 - 12 September 2025
Dear players,We are going to release a hotfix to fix some issues. It will improve the game’s stability and player experience. Update Content Adjusted the mutation spawn probabilities for each rarity tier：Tier 1Tier B - 10%Tier C - 90%Tier 2Tier B - 40%Tier C - 60%Tier 3Tier A - 10%Tier B - 50%Tier C - 40%Tier 4Tier S - 10%Tier A - 40%Tier B - 40%Tier C - 10%Tier 5Tier S - 60%Tier A - 30%Tier B - 10%Adjusted Some Mutation Rarity Increased Rarity Mutations:Ignited（B->A）Charged Roll（B->A）Limited Invincibility（B->A）Light Load（C->B）Mind Over Matter（C->B）Self-Sufficiency（C->B）Rapid Recovery（C->B）Collectivism（C->B）Empathy（C->B）Night Owl（C->B）Decreased Rarity Mutations:Fuel the Flames（A->B）Unchained Might（A->B）Blood Bullets（A->C）Shotgun Punch（B->C）Boxing Training（B->C）Additionally, we've removed the mutations Blood Money and Desperate Measures from both Script I and Script II.
- Update Notice - AUG 6 - 6 August 2025
Dear players,We are going to release a hotfix to fix some issues. It will improve the game’s stability and player experience. BUGFixed a bug where the machine gun would not stop firing when releasing the left mouse button during sustained fire while in a hit state.
- Update Notice - AUG 1 - 1 August 2025
Dear players,We are going to release an update to fix some issues. It will improve the game’s stability and player experience. The server will be down for maintenance.Maintenance Time14:00 to 15:00 am, Aug 1, 2025 UTC+8Free PassThe daily play limit for the Mistery Free Pass has now been adjusted to unlimited.- The Free Pass will remain permanently available on Steam.- Aside from Battle passes, shop and other out-of-match content being locked, core gameplay is identical to the full version.- Players can matchmake with all players normally, and achievements/progress will carry over.- To access the complete experience, purchase the full version of MisteryFactionsAlternate: Transformation skills no longer grant extra HP after morphing.Betrayer: Max HP bonus after evolution reduced from 100 → 75.CharactersRobot: Active skill shields now grant immunity to electric shocks while activeMapOperat…
- Update Notice - JUL 11 - 11 July 2025
Dear players,We are going to release an update to fix SOME issues. It will improve the game’s stability and player experience. The server will be down for maintenance.Maintenance Time14:30 to 16:30 am, JUL 11, 2025 UTC+8 UIUpdated the majority of UI designsOthers-Increased weekly quests to 3-Preview for avatars, avatar backgrounds, and titles added to the customization interface-In-match wheel moved from the favorites interface to the customization interface
- Update Notice - MAY 23 - 23 May 2025
Dear players, We are going to release an update to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 10:00 to 11:00 am, MAR 23, 2025 UTC+8 Factions Reaper: Now grants Mutation Points and Mist when prey dies. Assisting players in the hunt will also receive samples. Improved reward acquisition notifications. Mistwalker: Now inflicts a slow effect when attacking low-Sanity targets. Maps Beacon Charging: Charging time increased from 50s to 60s. UI Added reward hints to certain out-of-match UI elements. Bug Fixes Fixed synchronization issues with sniper rifle bullet trajectories. Fixed synchronization issues with grenade launchers. Fixed incorrect effects of the Emotional Cocktail. Optimizations Reduced polygon count on certain models.
- Update Notice - APR 30 - 30 April 2025
Dear players, We are going to release an update to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 12:30 to 13:30 am, APR 30, 2025 UTC+8 Balance Added different effects triggered upon transformation for Alternate. The Burning Man: Applies 6 stacks of Burn to nearby players. Bloom Split: Slows nearby players for 2 seconds. Mistwalker: Creates a patch of mist beneath the feet of nearby players. Betrayer The Reaper Now reveals its target to all players after a brief delay. Upon the target's death, it drops 3 additional Hearts and advances the Reaper's Evolution. No longer triggers permanent Mark of Death when health falls below 50. Character Psychologist Mind Reading: Now always verifies the identities of two players. If fewer than two players are selected by nightfall, random survivi…
- Mistery Free Pass & “Rock and Roll" Edition are Available NOW! 30% Discount! - 25 April 2025
Dear Players We are about to launch our biggest update since release on April 25th! Not only will we improve game stability and the overall experience, but long-awaited new content will also be implemented! The server will be down for maintenance. Maintenance Time 10:00 to 11:00 am, APR 25, 2025 UTC+8 Mistery Free Pass is AVAILABLE NOW Mistery Free Pass is now available on the store page—download and play now! The Free Pass will be permanently available on Steam, allowing players to enjoy Three matches per day. While in-game store, battle passes and other external content are locked, the core gameplay is identical to the full version. You can match with all players as usual, and achievements/progress will carry over after you buy the full version. Rock and Roll Edition is AVAILABLE NOW New Characters The Mystery Control Institute has recruited two new Operators: the Rockstar and the Dir…
- Update Notes - MAR 28 - 28 March 2025
Dear players, We are going to release an update to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 10:00 to 11:00 am, MAR 28, 2025 UTC+8 Balance Factions Betrayer-Infection - Cast range reduced from 15m → 5m. Items Shotgun - Damage adjusted from 18–36 → 14–32. - shots to down a player increased from 5 → 7. Rifle - Damage per shot reduced from 3×8 → 3×7; bonus multiplier increased from 0.3 → 0.4. - Shots to down a player increased from 6 → 7. Axe - Critical hit damage increased from 14 → 16. - Fixed a bug causing guaranteed crits during charged attacks. Adrenaline Rework Previous dodge roll invincibility frames made Adrenaline combos overpowered. Even without i-frames, its strength needed tuning for high-tier roll mutations. - Old: 25% movespeed + no stamina loss for 10s → New: 20%…
- Spring Sale & MAR 14 Update Notes - 13 March 2025
Dear players, We are going to release an update with many optimizations and new content! The server will be down for maintenance. Maintenance Time MAR 14, 10：00 - 11：00 (UTC+8) Spring Sale Mistery is to be included in the Steam Spring Sale with a discount of 20%! New Characters Rocker can set up his stage anywhere and make the audience dance to it. Because of his rebellious spirit, rocker's faction cannot be detected. Director can place an invisible mannequin that charges towards other players or monsters as they approach, and blows itself up. Once her trap or doll has dealt damage to a player, it temporarily tags that player. Item - Some of the combat props give instant regen. This can be a very frustrating experience sometimes. - Most recovery props now have a 0.65-second spell time. - Scanners & Traps Traps can now be detected by scanners and the Engineer's active skill. - Guns Balan…
- Update Notice - FEB 28 - 27 February 2025
Dear players, We are going to release an update to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 10:00 to 11:00 am, FEB 28, 2025 UTC+8 Update Notes Balance Fixed an issue with the invincible frames when rolling Alternate Wicker Man The transformation’s duration is improved from 10s to 15s Call of Darkness The transformation’s duration is improved from 10s to 15s Grip of Lunacy The transformation’s duration is improved from 10s to 15s The transformation’s duration after being strengthened is improved from 15s to 20s Item Rubber Duck’s duration is reduced from 12s to 8s. Monster Charger won’t accelerate after being electrocuted. Threat Entities’s player tracking range is wider now. Bug Fixed an interaction issue when corpses are devoured. Fixed some movement/action bugs. Fixed a bu…
- Update Notes - FEB 14 - 14 February 2025
Dear players, Today's maintenance and update are complete. Welcome to play! BALANCE Get 3 max HP if you cannot mutate more ITEMS Candy’s max stack is reduced from 99 to 1 All Tier 2 Weapon’s cost is reduced from 6 parts and 4 Mistery to 6 parts and 3 Mistery Axe’s additional damage is reduced from 5 to 4, and the chance increases by charging time, from 30% to 100% Torch also restores Sanity for other players surrounding Electric Baton’s additional damage is increased from 5 to 8, and its base attack is reduced from 8 to 7 Electric Blade deals an additional 12 damage to units that just get an electric shock, and its base attack is reduced from 10 to 9 Chainsaw’s movement speed bonus is reduced from 75% to 50%, and its duration 3s to 2s Shotgun’s minimum damage is reduced from 15 to 13 Sample’s cost is increased from 2 Mistery to 3, and its max stack 5 to 99 Meat’s max stack is increased…
- Server Maintenance Notice - FEB 14 - 12 February 2025
Dear players, We are going to release an update to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 10:00 to 12:00 am, FEB 14, 2025 Update Notes The list will be released when the maintenance happens We are paying close attention to issues that affect players’ experiences and working hard to fix them. Thank you for your support! We are Game Frontier. Welcome to chat with us! - Discord - Twitter (X)
- Happy Lunar New Year! - 28 January 2025
Dear players, Happy Lunar New Year! Thank you for your support as we announced and released the game in the past year. We prepared a small gift for everyone! Use code “BPRefrain” to exchange for it. We will continue to optimize the game to create a more interesting experience. Stay tuned! We are Game Frontier. Welcome to chat with us! - Discord - Twitter (X)
- Update Notes - JAN 25 - 25 January 2025
Dear players, Today's maintenance and update are complete. Welcome to play! Balance Improved HP by 50 for Call of Darkness, Grip of Lunacy, and Wicker Man. Alternates get 1 Part and 5 MAX HP after collecting Floras Reduced the output of Painkiller, Adrenaline, Walkie-Talkie, Mood Cocktail, and Panacea in mode 1. The special effect of the inquisitor’s skill is only visible to those affected. Mind Reader’s skill effect is only visible to herself. Encounter Deleted an encounter that caused many logical issues Processor’s launch price is reduced from 10 to 5 Mistery, and cannot upgrade tier 2 to tie 3 weapons. Gacha Machine’s price is improved from 5 to 10 Mistery. Changed some encounters’ images. Combat Fixed an error that extends the interval between attacks Fixed an error that shows wrong numbers of Alternate’s transformations Alternates get 1 Part and 1 Mistery after collecting Floras O…
- Server Maintenance Notice - JAN 25 - 24 January 2025
Dear players, We are going to release an update soon to fix many issues that you care about! It will improve the game’s stability and player experience. The server will be down for maintenance. Maintenance Time 8:00 to 9:00 am, JAN 25, 2025 Update Notes The list will be released when the maintenance happens We are paying close attention to issues that affect players’ experiences and working hard to fix them. Thank you for your support! We are Game Frontier. Welcome to chat with us! - Discord - Twitter (X)
- DELUXE DLC PERMANENTLY FREE - 23 January 2025
Dear everyone, Thank you for your support and feedback since our release. We are honored and encouraged. To express our appreciation, all players who buy MISTERY get the Deluxe DLC for free, and it is automatically added to the library. We will create more interesting content for everyone, and we look forward to your continued support! We are Game Frontier. Welcome to chat with us! - Discord - Twitter (X)
- THANK YOU! UPDATE COMING THIS WEEK - 22 January 2025
Dear players, Many thanks to everyone playing our game! Your support is the driving force pushing us forward. We have been collecting every feedback and bug report from players, and fixing them. Within this week, we’ll release an update to fix many things to improve the game experience, and will continue to do so for a long time. As the game experience and performance become more stable, our work will focus more on performance optimization, balance adjustment, UI & art iterations. We will also release new content updates for free including new modes, Alternate skills, mutations, items, and more. We are Game Frontier. Welcome to chat with us! - Discord - Twitter (X)
- MISTERY IS OUT NOW! - 21 January 2025
Greetings! Thousands of thanks to everyone who has been supporting us! Mistery is out now! https://store.steampowered.com/app/2537010/_/ LANGUAGE LOCALIZATION We plan to support languages including English, Spanish, Portuguese, Japanese, and Korean (the original language is Chinese). However, the languages still are not polished enough. The in-game text has no shortage of flaws, inconsistencies, and even plain errors. We are sorry for the languages and will continue to optimize them. If you feel uncomfortable with the flawed translations, we strongly recommend you wait for our further language optimizations, and then decide if you should purchase the game. Thank you! FREE DELUXE PACKAGE DLC From now on throughout 8:00 am JAN 23 PST, all players who bought Mistery can get the Deluxe Package DLC for free! It includes an epic skin, title, and 500 coins. COMPENSATION for the DELAY To show a…
- MISTERY RELEASE DELAY! - 20 January 2025
Dear players, It was planned that Mistery should be released earlier this day, However, due to some important issues, we are postponing the game for a short period of time (from hours to several days). We are doing everything we can to release the game as soon as possible. Thank you for your patience.
- Mistery to be Released on JAN 19! - 10 January 2025
Greetings MCI colleagues, Mistery is set to release on JAN 19, 2025, PST! https://youtu.be/8YSFrgBWMcg Confirmed Languages At this time we are looking into supporting the following languages not long after the release. English Simplified Chinese Traditional Chinese Brazilian Portuguese Spanish Japanese Korean And we are looking into adding more languages as we can. Upon release, the game will include 3 different modes, and we will continue to update the game with new characters, skills, events, modes, monsters, etc. Features Dive into Site 14 and Site 31 after the containment breach Fight against anomaly entities that have different mechanisms Play as 10+ characters with unique skills Choose to coop or betray in this unique coop survival game Craft weapons and find anomalous items like Bottled Lightning Explore and interact with random encounter events and hazards Customize your charact…
