
Play as the Forren Foundation’s chief scientist to capture, study, and convert the Holy Core Battlemaidens into your loyal followers!
Modeled estimate, not a reported figure. How we estimate →
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About

Operation Darkside DX is an updated version that combines the main game and DLC content.
Compared to the original version, this edition includes the following updates and adjustments:
・Includes the full content of the main game and the DLC Operation Darkside DX: Complete Combatant Corruption Chapter.
・Fully updated character sprites and CG scenes for Kei Nekomiya.
・Updated casual outfits for the five characters from the original version.
・Improved audio quality for selected voice lines.
・Changed the voice actress for the DLC character Diamond to Ryoko Tezuka.
Long ago, the Forren Foundation was at the brink of conquering the world when the sudden appearance of the Holy Core Battlemaidens, warriors who can transform at will, pushed the Foundation to defeat.
As the organization's chief researcher, your mission is to capture the Battlemaidens, study their abilities, and turn them into assets for the Foundation.
Capture them all, build your army, and take the world.


Defeat the Battlemaidens in turn-based combat to capture them.
Once captured, each heroine can undergo various forms of research.
A fully researched Battlemaiden can be deployed into your combat units with new skill builds.
Equip your troops, strengthen your squads, and forge your own corrupted legion!

Each heroine features dedicated artwork, voice lines, story content, and training scenes.
• Akiho Sasaya — A cheerful and optimistic rookie with strong ideals
• Rikka Minase — The cool-headed, close combat specialist
• Elena Seidou — Deputy commander of the Corps, elite background, overwhelming strength
• Kei Nekomiya — Intelligent and mysterious. Also, hard to read.
• Nayuta Yagumo — The calm and commanding leader of the Battlemaidens.
• Hisui Saionji — Former secretary of the Battlemaidens who infiltrates the Foundation to rescue the deputy commander.
• Anastasia Petro Diamond — A sword-wielding soldier with exceptional discipline
Every Battlemaiden features extensive training events and CGs: Milking, Creampies. Group play, Livestreams... Multiple positions in a variety of situations, catering to all sorts of fetishes!
• A newly awakened rookie forced into a milking session after capture

• The proud deputy commander serving her superior under the office desk

• A justice-driven fighter girl dressed as a bunny hostess to entertain guests

• Watch as former teammates are turned into playthings

• Heroines: 7
• H scenes: Over 35 H-CG sets with more than 400 variations
• Voice: Full voice acting for all heroines
• Estimated playtime: 2 to 4 hours
• Due to version adjustments, some voice performances may differ from the displayed text.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: Japanese*, English, Simplified Chinese, Traditional Chinese, Korean*languages with full audio support
Engagement
Hours played at review time, across 64 reviews with recorded playtime.
Reviews
Themes across 64 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
야 - 성우열연, 거의 풀보이스, 귀축물인거 뺴면 나쁘진 않지만 그렇다고 꼴은 아님. 겜 - 쓰레..... 하 중에 상 드립니다. 10에 3정도.... 권하진 않습니다.
虽然全是静态cg,但剧情文案属实不错,配音也不差,配上30以下这个价格很值当了
練日聽可以,弟弟硬不行
good
I was excited for this game but ultimately would give it a 6-7/10. This is a decent purchase for the price, but there are gameplay and story things I do not like. Gameplay wise, the reviews mentioning how grindy it is are correct. I understand gathering resources but the amount of times I had to rob a bank felt a tad bit high. Spoilers ahead [spoiler] Now, for my issue with the story: I understand that they were trying to cover different tags with the three types of Training you can give each Battle Maiden, and if you are looking for individual scenes for each tag then this will be good for you. However, I was distracted by just how disjointed everything felt going from each training branch. My least favorite was the Seikaku Research branch as it made the corruption ultimately feel hollow. All the scenes establishing the corruption in the Horniness and Reeducation branches are rendered pointless. All of the corrupted girls now fighting for you are not actually the girls, they are some equivalent as justified by the writers. For me that felt cheap, and dropped my enjoyment of the game. [/spoiler] Ultimately a decent game for the price if you are here for short scenes and a corruption theme. If you are looking for a better long burn story, or have scenes which naturally flow into one another, then you may wish to go elsewhere.
Well Done! | Interesting.
I Want To Give It 10/10 But I Was Doctor Who Only Watching Like Come On let Me Do Somthing Everyone Got His Damn Slave&Women And I Only Get To Watch And Manage Stuff Only ..... Over All i Give it 9//10 I Got More TO Say But I will Stop Here . ⣞⢽⢪⢣⢣⢣⢫⡺⡵⣝⡮⣗⢷⢽⢽⢽⣮⡷⡽⣜⣜⢮⢺⣜⢷⢽⢝⡽⣝ ⠸⡸⠜⠕⠕⠁⢁⢇⢏⢽⢺⣪⡳⡝⣎⣏⢯⢞⡿⣟⣷⣳⢯⡷⣽⢽⢯⣳⣫⠇ ⠀⠀⢀⢀⢄⢬⢪⡪⡎⣆⡈⠚⠜⠕⠇⠗⠝⢕⢯⢫⣞⣯⣿⣻⡽⣏⢗⣗⠏⠀ ⠀⠪⡪⡪⣪⢪⢺⢸⢢⢓⢆⢤⢀⠀⠀⠀⠀⠈⢊⢞⡾⣿⡯⣏⢮⠷⠁⠀⠀ ⠀⠀⠀⠈⠊⠆⡃⠕⢕⢇⢇⢇⢇⢇⢏⢎⢎⢆⢄⠀⢑⣽⣿⢝⠲⠉⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⡿⠂⠠⠀⡇⢇⠕⢈⣀⠀⠁⠡⠣⡣⡫⣂⣿⠯⢪⠰⠂⠀⠀⠀⠀ ⠀⠀⠀⠀⡦⡙⡂⢀⢤⢣⠣⡈⣾⡃⠠⠄⠀⡄⢱⣌⣶⢏⢊⠂⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⢝⡲⣜⡮⡏⢎⢌⢂⠙⠢⠐⢀⢘⢵⣽⣿⡿⠁⠁⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠨⣺⡺⡕⡕⡱⡑⡆⡕⡅⡕⡜⡼⢽⡻⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⣼⣳⣫⣾⣵⣗⡵⡱⡡⢣⢑⢕⢜⢕⡝⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⣴⣿⣾⣿⣿⣿⡿⡽⡑⢌⠪⡢⡣⣣⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⡟⡾⣿⢿⢿⢵⣽⣾⣼⣘⢸⢸⣞⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠁⠇⠡⠩⡫⢿⣝⡻⡮⣒⢽⠋⠀⠀
Одна из любимых игр за последние года. Долго ждал пока выйдет в стиме чтобы докупить :) Радует так же как и пиратская версия год назад :) В общем игра хорошая, перевод есть, баги отсутствуют. Даже патч качать не надо.
It's your standard extreme fetish game, The corruption mechanic is not very interesting. it is extremly basic and tbh i dislike the direction it goes sometimes. this is a fetish game that chooses to go for a wide array of fetishes instead of soley corruption. This is a bad thing because the corruption is very quick and feels a little lacking. and because it is a extreme fetish game the corruption does not feel natural. That being said it is well drawn and the basic gameplay loop is fun enough it's definetly not anything special but is better than a lot of nsfw games. if the game was either more ambitious or toned down the fetish content i do think it has a lot of potential. but at the moment i can only reccomend it as a cheap nsfw game that does a fine job but nothing more.
为什么有三个成就解锁不了。是还没有吗?
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Trends
Concurrent players on Steam, sampled daily since tracking started.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
Games most often reviewed by the same players — an audience-affinity signal from our review sample, not full ownership data.
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