Operation Darkside DX [v2.6] [Darkness Lab]

July 11, 2026F95

Play as the Forren Foundation’s chief scientist to capture, study, and convert the Holy Core Battlemaidens into your loyal followers!

Thread Updated: 2026-07-10

Release Date: 2026-07-10

Original Title: オペレーションダークサイド:聖核戦姫壊滅作戦

Aliases: Operation Dark Side: Holy War Maiden Annihilation Operation

Developer: Darkness Lab DLsite – Ci-en – Steam

Publisher: Mango Party Steam – Discord – Facebook – Instagram – Twitter – DLsite

Censored: No

Version: 2.6 Steam

OS: Windows

Language: English, Japanese, Chinese, Korean

Voices: Japanese

Store: DLsite – Steam

Genre:

2D Game, 2DCG, Ahegao, Anal Sex, BDSM, Big Ass, Big Tits, Censored, Creampie, Corruption, Drugs, Fantasy, Futa/Trans, Groping, Humiliation, Male Domination, Japanese Game, Lactation, Mind Control, Monster, Multiple Penetration, Prostitution, Rape, School Setting, Simulator, Sex Toys, Slave, Tentacles, Titfuck, Trainer, Transformation, Turn Based Combat, Oral Sex, Vaginal Sex, Voiced, Vore

Installation:

1. Extract and run.

Changelog:

2026-07-12

Added Steam Version

v1.6

– Bug fix for auto battle

– Addition of resolution settings

– Bug fix: Sometimes the scenario turns white when FPS drops below 60

Developer Notes:

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.

【The righteous battlemaidens will fall one by one…】

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.

【Turn based battles & research systems】

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!

【7 Holy Core Battlemaidens with full voice acting】

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

【35+ H-Scenes】

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