Comparison

BUNKER PROTOCOL vs 脱出ゲーム 静かな書斎

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

BUNKER PROTOCOL

Explore a deserted military black site and solve intricate puzzles to escape. This 3D escape room experience requires observation and item combination to progress through chained challenges. A built-in hint system guides you without spoiling the fun.

Highlights
  • Immersive 3D environment exploration
  • Chained, multi-stage puzzles
  • Observation-based clue finding
  • Collect and combine items
  • Guided puzzle progression
  • Built-in hint system
  • Multi-language support
Features
Read full description

You wake up alone in an abandoned military black site. The command terminal is dark. The security door is sealed. Your only way out is to solve every puzzle left behind in this classified facility. BUNKER PROTOCOL: Black Site is the second entry in the hit escape game series BUNKER PROTOCOL — a fully 3D escape room experience designed for mobile. Explore every corner of a deserted covert facility, examine objects, collect items, and piece together the solution to escape. FEATURES - Immersive 3D Environment: Explore a richly detailed facility rendered in full 3D. Rotate your view, walk around freely, and examine objects up close. - Chained, Multi-Stage Puzzles: Power on the command console, crack a cipher case, dial in a wall safe combination, and reorder mysterious symbols. Solving one puzzle unlocks the next. - Observation Over Trivia: Every clue you need is hidden somewhere in the facility. No outside knowledge required — just look closely, think it through, and solve. - Collect and Combine: Pick up access cards and tools scattered through the facility, then combine them to unlock new solutions and hidden mechanisms. - Guided Puzzle Progression: Puzzles unlock in a carefully designed order. Restore power, bypass authentication, and crack the final cipher to earn your way out. - Built-in Hint System: Stuck on a puzzle? A subtle hint system nudges you in the right direction without spoiling the answer, keeping the joy of discovery intact. - Immersive, Uninterrupted Play: No ads ever appear while exploring or solving puzzles. The only ad is an optional rewarded video when you choose to view a hint — your immersion stays intact. - English, Japanese & Russian: Fully localized for all three languages. HOW TO PLAY Unlike typical "tap to move" escape games, this is a true 3D experience: drag to freely rotate your view, tap to approach and interact with objects. Examine everything, collect useful items, and solve the puzzles in order. Every solved puzzle brings you one step closer to escaping the facility. THE CHALLENGE This facility hides many secrets: a silent command terminal, a sealed security door, a wall safe demanding the right combination, lockers with no name on them. Can you connect every clue and find your way out? You don't need to have played "Reactor Core" first. Download now and take on the black site.

About

脱出ゲーム 静かな書斎

Explore a peaceful study and an astronomical observatory to uncover hidden mysteries. Inspect objects, collect items, and solve puzzles using clues to escape. The game offers a relaxed pace with automatic saving and optional hints.

Highlights
  • 3D escape game environment
  • Inspect objects and collect items
  • Solve puzzles with symbols and numbers
  • Automatic progress saving
  • Optional hints and answers
  • Dual language support (Japanese/English)
Features
Read full description

A quiet room. A hidden mystery. Escape Game: Quiet Study is a 3D escape game set across two rooms: a peaceful study and an astronomical observatory. Inspect the furniture, collect useful items, and connect the clues to find your way out. LOOK CLOSER Tap the arrows to turn, then tap objects to inspect them up close. Examine keyholes, curious symbols, and small details. Optional object markers help you find places to explore. TWO ROOMS, MANY DISCOVERIES A traveler’s diary, a globe, a gramophone, and butterfly specimens await in the study. In the observatory, investigate star charts, a telescope, moon phases, and a balance. Solve puzzles using pictures, symbols, colors, numbers, and the items you find. TAKE YOUR TIME There is no time limit. Your progress saves automatically, so you can take a break and return later. Clear the first room to unlock the second room in chapter selection. HELP WHEN YOU NEED IT Hints and answers follow the puzzle you are currently solving. Answers include the steps and reasoning. Once unlocked, the same content can be read again without another ad. A QUIET ATMOSPHERE Enjoy background music and sound effects, with an option to switch them off. Japanese and English are supported, and you can change languages in the game. ABOUT ADS The game includes banner ads and interstitial ads when starting a selected chapter or moving from the first room to the second. Rewarded ads unlock new hints and answers. If an ad is unavailable, your selected hint or answer is shown for free. An internet connection is required to display ads. Observe. Connect. Discover.

Screenshots

BUNKER PROTOCOL4 screens
脱出ゲーム 静かな書斎4 screens

Verdict

The call

The clearest difference is monetization model: 脱出ゲーム 静かな書斎 at ad-supported against BUNKER PROTOCOL's free with in-app purchases. On price, review sentiment, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BUNKER PROTOCOL ships an update weekly, 脱出ゲーム 静かな書斎 every 9 days. The most recent releases landed on November 10, 2026 and October 26, 2026 respectively.

Scorecard1 real difference · 7 level
BUNKER PROTOCOL versus 脱出ゲーム 静かな書斎: the parameters behind the verdict, then further details
ParameterBUNKER PROTOCOL脱出ゲーム 静かな書斎
PriceFreeFree
Positive reviews0.0% of reviews0.0% of reviews
Update frequencyWeekly — betterEvery 9 days
AdsYesYes
In-app purchasesNoNo
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size114 MB25 MB
Age rating4+4+
DeveloperSink Capital, Inc.iida atsushi

Customer experience

BUNKER PROTOCOL

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

脱出ゲーム 静かな書斎

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

BUNKER PROTOCOL

No in-app purchases

None

脱出ゲーム 静かな書斎

No in-app purchases

Questions

Is BUNKER PROTOCOL free?
BUNKER PROTOCOL is free to download, with no in-app purchases.
Is 脱出ゲーム 静かな書斎 free?
脱出ゲーム 静かな書斎 is free to download, with no in-app purchases.
Do BUNKER PROTOCOL or 脱出ゲーム 静かな書斎 have ads?
Both BUNKER PROTOCOL and 脱出ゲーム 静かな書斎 show ads.
Which is updated more often, BUNKER PROTOCOL or 脱出ゲーム 静かな書斎?
BUNKER PROTOCOL ships an update weekly, and 脱出ゲーム 静かな書斎 every 9 days. Most recently, BUNKER PROTOCOL was updated on November 10, 2026 and 脱出ゲーム 静かな書斎 on October 26, 2026.

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