Crimson Prison
by Dajimess
3DCG
Adventure
Animated
Combat
Corruption
Dating Sim
Fantasy
Female Protagonist
Graphic Violence
Harem
Humor
Lesbian
Male Protagonist
Mobile Game
Multiple Protagonist
Oral Sex
Romance
Sandbox
Superpowers
Trainer
Vaginal Sex
Voiced
One fateful day, in a remote alley of Sumairu-Urbem, a homeless girl is kidnapped and sent to an Underground Prison for death matches... Nuevo Faredo's Prison. Your mission —as a retired mentor— is to train her in using her new energies and protect her so she does not die in her first fight, while searching for a way to secure her freedom. Hundreds of inmates are brought in every year, and hundreds more are left forgotten beneath the cold earth. Will you be able to protect her while strengthening your party to root out the evil that plagues the inmates' hearts? I believe in your judgment.
Screenshots
v0.1.6.6
(2026 - 08 - 15)
New Content:
+ 9,000 Words
+ 600 CGI
+ 1 Main Quest with multiple sub-quests
+ 1 Side Quest with multiple sub-quests
+ 3 Kathryn Events
New music tracks and sound effects
Added the new Patreon-exclusive skin for Miwa:
"Sumairu College"
Added the new quest reward skin for Kathryn:
"School Uniform"
Reworked Kasumi's flashback
Added the option to replay “Reworked” events when loading an existing save
Added a new storage system (Quest Reward) and its tutorial
Added an autosave before Zinnia's battle
Added Affection and Lust bars to the gift-giving screen
Added character icons when switching playable characters (Kathryn, Kasumi, and Zinnia)
Changes and Improvements:
Added a new function that restricts quest-related items to one purchase at a time (such as Clarissa's Milk or the Funeral Attire)
Equippable items (such as accesories and clothes) can no longer stack in the inventory
Base stats for equippable items are now linked to their original item, laying the groundwork for the future equipment upgrade system
Performed preventive and ongoing maintenance on the subscriber code validation server to improve bot protection
Completely redesigned the internal logic of the
Gift
,
Shop
,
Inventory
,
Item Declaration
,
Item Usage
, and
Equipment
systems
Unified and optimized inventory code for Sora, Zinnia, and Kasumi
Made minor adjustments to the gym system
The time-of-day display is now hidden while the Quest Journal is open
Reorganized Charly's interaction menu to reduce visual clutter
Removed the inventory quantity indicator when only one copy of an item is owned
Removed HUD icons from the day transition screen
Bug Fixes:
Fixed disproportionate mouths introduced by the latest 3D model update
Fixed an issue where Clarissa would disappear after speaking with her at the Church while playing as Kasumi
Fixed an issue where item descriptions and balances would only affect items in the shop, but not in the inventory
Fixed an issue where the
Paper Kunai
were not removed from the inventory after completing the quest
“A FADING SHADOW”
Fixed an issue where the area's background music would occasionally fail to resume after completing a quest
v0.1.5.9 [Hotfix, All platforms]
Improved new players experience
Added in-game and menu tutorials
Added a total of 14 tutorials
Some early-game events have been slightly adjusted to better align with the new tutorials
Rebalanced XP system gain
Improved some quest descriptions
Increased bonus affection and lust points from the skill tree abilities
“Tentative Interaction”
and
“Intensive Affection”
from
2/3/4/5/6 → 2/5/7/11/15
Increased maximum affection level from
8 → 9
The
“Inmate Cronies”
skill is now free at the start of a new game; players who previously purchased it will receive a Crimson Credits refund
Improved kunai pickup hitbox in the quest
“A Fading Shadow”
Fixed an issue in the quest
“A Fading Shadow”
where some kunai would not appear correctly
Fixed an issue where a quest requiring purchasing an item would sometimes not be marked as completed
Fixed an issue where the quest
“Caprice”
showed a different version of the protagonist
Fixed a crash that could occur when interacting with Silvie under certain conditions
Removed a floating arrow in the hot spring dresser room (reserved for future updates)
Updated internal player character logic to prevent potential save corruption in the future
Restructured code across numerous game functions
Numerous Spanish translations have been corrected or added
v0.1.5.8 [Hotfix, Only on Android]
v0.1.5.7
+ 11,000 Words
+ 930 CGI
+ 2 Main Quests with multiple sub-quests
+ New music tracks and sound effects
Spelling errors and potential bugs fixed
Fully translated into Spanish
Fixed an issue where Chisato's CPPB would occasionally not allow the purchase of an access pass
Fixed an issue where, after purchasing with Merumi's CPPB, Merumi's animations would play incorrectly
Fixed an issue showing incorrect Casino prices in the Spanish translation
Numerous bugs fixed in the Replay Gallery
Previous events added to the Replay Gallery
Code restructuring and rewriting to optimize the game for newer compiler versions
Code and variable optimization
Direct and noticeable improvements to performance and loading screens
Fixed Patreon Code not working.
(Hotfix)
HOTFIX v0.1.5.7:
Initial chance to access the lab increased from 30% to 50%
Adjusted the success rates of obtaining an approved lab pass in the “Damn These Odds” skill to match the new base lab access percentage
Fixed an issue where Chisato's CPPB displayed incorrect approval percentages
Added a new cheat to master all jobs
In-game Patreon and Subscribestar members will now be updated via a server
Global variables updated
GENERAL GRINDING ADJUSTMENTS:
Affection and Lust points gained from hanging out with the girls and during complicity events have been increased: from 8 to 11, and from 11 to 17
Crimson Credits earned after completing a work shift have been slightly increased (remember, it is still a prison, you don't get paid well)
Some quests that required excessive grinding have been adjusted and are now less tedious
Mastery Points (MP) gained after completing work shifts have been increased: from 70 to 145, and from 145 to 230
Injury rates during training have been reduced from the second attempt onward (the first attempt will always be 0%): 15% → 5%, 20% → 15%, 35% → 25%, 60% → 50%, and 85% → 75%
v0.1.5.0
+ 10,000 words
+ 450 CGI
+ Fukazawa Yuuka added to the Inmate Roster
+ 5 Yuuka Skins (2 Patreon-exclusive)
+ 6 Yuuka hang out cycle events
+ 1 Main quest
+ 3 Girl quests (Yuuka)
+ 4 Totally new song tracks
Typo corrections and potential bugs fixed
Fully spanish translation
Fixed a bug where the skill
“Intensive Affection”
was also granting extra affection points when giving gifts to the girls
By request from those who hate all the rushing in the game, the base affection points earned from hanging out with the girls have been increased from
8
to
11
v0.1.4.0 Update (2025 - 09 - 29)
+ 12,000 words
+ 500 CGI
2 New Maps
2 Main quest (with lots of CGI events and a Puzzle)
2 Side quest
4 Totally new song tracks
Typo corrections and potential bugs fixed
Fully Spanish translation
An exclusive, commemorative item for subscribers
v0.1.3.5 Release (2025 - 07 - 30)
The story is great, the characters and writing is well done and the renders are beautiful and engaging. Only docking one point off because of the insane amounts of grind. Everything costs so much yet all the jobs pay a pittance. If that wasn't enough, raising the affection level of a character requires something like 7-10 times interaction per affection level (depending on xp gain). If that wasn't enough, you have useless fetch quests that achieve nothing except make you collect apples, then wait for it to respawn, and collect more apples, all for no sense at all. If that wasn't enough, the training is insane and takes so long, and if you don't keep it up it decreases. Not to mention the constant injuries (like just why???). The only reason and the only way I continued to play this game was because I had URM installed. I used it to skip all the grind. But even constantly finding and changing variable values was tedious, there's so much goddamn useless grind in this game.
Bittersweet in the best way. I really enjoyed this story and the characters were incredibly well written. It was both heartbreaking and satisfying in the best way. I loved how each character had depth and a personal arc that pulled me in emotionally. That said, I hope future updates will include a real combat system, where stats actually influence battles instead of just being a number to meet for triggering events. It would also be great to see a more lively world, with more background characters to make the setting feel populated and alive, even if they aren’t interactive.
Gameplay is excellent - it's what most Ren'Py Sandboxes wishes they could be. Personally, I dislike the deteriorating stats mechanic, but I keep seeing it, so I guess it's the new norm? Graphics aren't exactly groundbreaking and the models are well.. garbage really.. but the few animated scenes are done well.
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