Synopsis
Story
In a world bathed in rapid scientific advancement and countless wars, there are still some human organizations that remain.
VMWN, the union of scientists, is one such organization. They have made it their mission, and their ethos, to recover and maintain technology that was lost in the flames of war.
However, even powerful organizations are helpless against the passage of time. The abandoned research centers dotted around the world where forbidden technology is sealed away are beacons of hope.
Dorothy is a researcher willing to do whatever it takes to advance her career.
Using state-of-the-art research, she works to acquire mysterious ancient technology.
But is it worth it?
Game Introduction
Dorothy, a researcher for VMWN, longed to be transferred to the section that handles external research. In order to fulfill that dream, she takes part in an insanely difficult one-man covert recovery mission and heads into the depths of an abandoned laboratory with reckless abandon!
Get your hands on powerful upgrades while avoiding terrible danger in this mine-sweeping RPG!
She’ll face countless strange status conditions, and if they’re not taken care of in time, she’ll fall even deeper into the abyss!
Combat isn’t the only danger she faces, however… she also has to contend with traps and uncontrollable lust!
Will you resist or endure? Or will you overcome everything and turn it into another strength.
Your choices determine her fate.
The possibilities are endless. Put her instincts and skills to good use! Battle, gain experience, and unleash her skills!
Heroine
Dorothy
A researcher for VMWN, and now part of the top-secret task force. She has state-of-the-art combat gear developed by VMWN.
Fully aware that her tools are prototypes, but knowing that testing them in the field would reap more rewards, she has taken the risk of this mission for the sake of her career.
If she and her data can return safely, her life will improve.
Yup. Everything will be fine.
Operator
Another member of the top-secret task force, she supports Dorothy on her mission.
She seems to know an awful lot about the organization.
Her skills seem to be quite impressive, which is why she was given the support role.
Apparently, according to the Operator herself, she has a good distinction between her work life and private life.
Rumor has it she disappears off the face of the earth once it’s time to clock out..
System
– Basic Play
Minesweeper-style exploration of an abandoned laboratory. If there are enemies present in any of the 8 blocks surrounding a block, the number will be displayed above the relevant block. Use Marking to your advantage!
You’ll find a variety of items and weapons in the lab that can be used to help you on your mission, but don’t let your guard down around traps!
– Statuses
If you’re caught in a trap or by enemies, you may be struck with an abnormal status.
If things get too much for your mind or your body, your adventure may come to a premature end…
– Skill System
Unlock hidden skills by completing mission nodes.
Use the Skill Tree to customize your load-out.
– Multiple Endings
Your journey may not always be smooth. If you are defeated, you may face humiliation at the hands of lab dwellers.
Clearing the game will grant access to New Game + where you can experience a variety of endings!
Important Points
Compatible Devices
Mouse only
Playtime
3~8 hours
For noobs and vets of the genre, the skill system will let you clear the game with much enjoyment.
Roughly an additional 4~5 hours is required to get all the achievements.
About the Demo
** We are aware of an issue where sometimes the screen is blank but the background music can be heard. Please be sure to check that the game runs on your system by downloading the demo before purchase! **
You can play the first 3 stages in the demo, and see one defeat ending.
You cannot transfer your save data from the demo to the full version.
| Circle | MHR Lab |
| Tags | R18, Puzzle, Voice, Music, Application, Chinese Simplified, Chinese Traditional, Japanese, English |
| Price | 1,980JPY |
Editorial Review
A puzzle-adventure hybrid that wraps light erotic content around exploration and environmental problem-solving—a combination still underrepresented in the adult game space. Lab Sweeper positions itself as a narrative-driven expedition game rather than a pure adult title, using the puzzle framework as genuine engagement rather than mere scaffolding for sexual content.
The worldbuilding here is genuinely atmospheric: a post-conflict setting where scientific organizations salvage lost technology creates natural tension between Dorothy’s ambition and the dangers lurking in abandoned research facilities. The premise mirrors survival-horror aesthetics but channels them through gameplay rather than jump scares. The voice acting and original music production elevate what could have been a perfunctory mobile title into something with genuine production value—these technical touches matter for immersion when you’re spending hours solving environmental puzzles between narrative beats.
The multilingual support across Simplified Chinese, Traditional Chinese, Japanese, and English signals thoughtful localization, suggesting developers understood their audience spans multiple regions and language preferences. This is rare commitment in the doujin space, where English translations often feel afterthought.
Dorothy herself reads as competent rather than helpless, which reframes the sexual content around agency rather than victimhood—a meaningful distinction in how adult titles position their protagonists. She’s advancing her career through her own choices, reckless as they are.
This lands squarely for players seeking adult content layered into legitimate puzzle design, combined with world-building that doesn’t feel purely mechanical. If you want traditional ero-games with minimal narrative structure, look elsewhere. If you’re fatigued by cookie-cutter adult visual novels and crave something that respects your time investment across multiple systems—puzzle solving, atmosphere, character voice work—Lab Sweeper delivers a rarer proposition: eroticism as one component of a fuller experience rather than its justification.
Get “Lab Sweeper ~Dorothy’s Secret ” on DLsite
English Version → Free TrialJapanese Original
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Related Tags:
Japanese | R18 | English | Music | Application
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