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Alien Invasyndrome [Demo v2.0] [Mozu Field/Sixie]

2d game 2dcg ahegao animated creampie internal view japanese game male domination male protagonist mind control monster puzzle rape rpg

4.1 Rating Updated Sep 12, 2026

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Through the deep space of thousands of stars,Exploration Vessel <Atlas> advances steadily.With a carefully chosen crew of female, they seek

Through the deep space of thousands of stars,
Exploration Vessel <Atlas> advances steadily.
With a carefully chosen crew of female, they seek for a way to continue the bloodline of humanity.
However, little do they know…
hidden in the silent shadow of the cosmos, another kind also strives to pass on.
Such kind hides in the crowd on the ship, an <Alien Larva> from a distant planet.
< This game is under active development, expect bugs happening and feel free to report. >

Tied to the fate of its bloodline,
it uses every way possible to grasp the faint hope.
Rooting on this vessel, turning these females into breeding beds.
To survive, this is its only way.
It’s only another typical day on < Atlas >, another “normal” day.

In this game, you play as the Alien. Weak in the beginning, you should utilize your
stealth ability to sabotage and grow, eventually dominating the ship.

Thread Updated: 2026-09-11

Release Date: 2026-09-05

Developer: mozu field / 百舌鳥 Steam – DLsite – Ci-en – Patreon – Twitter / Sixie六 – Patreon – Twitter

Censored: No

Version: Demo – 2.0

OS: Windows

Language: English, Japanese

Other Games: mozu field

Genre:

2D Game, 2DCG, Animated, Japanese Game, Ahegao, Rape, Vaginal sex, Mind control, Male domination, Male protagonist, Monster, Puzzle, Creampie, Rpg, Sandbox,

Installation:

1. Extract and run.

Changelog:

Demo v2.0

In V2.00, the game ends when you enter the elevator in the Lower Level.

For the Destruction Points and Intrigue Points used to obtain skills, there is no bonus this time, so both start from 0.

Destructible objects have been placed throughout each area, and you can obtain Destruction Points by destroying them.

Intrigue Points can be obtained by picking up items that are guaranteed to drop when you brainwash a character and then release them.

I believe Save/Load is now more stable than before, so please try that as well.

v0.99 Demo

・Added an event to move from the current area to the next area after boss battles.

・The kitchen area had numerous bugs that became difficult to fix, so it was completely removed and rebuilt.

・Implemented a pause button, allowing you to change language, adjust BGM volume, quit the game, or return to the title screen during gameplay.

※Save data loading is still unimplemented, so you cannot resume from where you left off after pausing.

・You can now attack enemies caught in traps.

・For this version only, the Trap skill is set to MAX from the start. Once bugs are nearly eliminated in this version, the demo will be complete. Future plans include implementing lower-level areas and creating the official title screen. After the demo is complete, we will prepare to announce it on the planned game sales site. Thank you for your continued support.

v0.97 Demo

・Charge Attack is now unavailable when the game starts

・Added event for acquiring the Charge Attack (By accessing the nest)

・Added Skill Tree menu for learning skills

※You may see a bug that says you can learn it again after the first time, ignore it cause it is WIP.

・Added event after boss fight (with sex animation)

・Now you may release hypnotized NPCs. Open the command list (C key) to select that function while you have someone hypnotized.

・The command list is now moved from B key (X on keyboard) to C key (C on keyboard).

v0.96.1 Demo

・Added the Security room mission and Area 1 Boss fight

・Demo now ends after boss fight

・Updated how attacking works to make it smoother

・No new sex scene

v0.95 Demo

・After the Prologue the game will be auto saved at that moment. You may press < 1 > on the main menu to load the save.

・Now you may use < Space > button to zoom in and out during sex animations.

・Added X-ray function for 2 characters (Machinist A & B). This is currently experimental, feel free to give comments regarding this.

・No new sex scene

v0.94 Demo

・Added Security Corridor event.

・Added new main cast NPC, the Machinist. (No scene yet)

・1 sex scene in the new event.

v0.93 Demo

Bugfixes

v0.92 Demo

・Kitchen is now functional

・Added 2 new mobs (Cooks),1 animation each

v0.9 Demo

・Added the full Doctor meeting event. (Mission system not implemented yet)

・Now getting hit looks more responsive

・Something might happen if you attack the Doctor…?

・Now you can repeat sex animation, the’d be some changes on the animation

・Upated UI

v0.83 Demo

・Bugfix

v0.82 Demo

・Added manual pose selection before sex scenes.

・Added sex animation stage control.

・Sex animations are now repeatable.

・Various bugfix.

v0.81 Demo

・Added Clinic, Laboratory and Cafeteria.

・Added 2 new mob crewmates.

・Added event of first meeting with Doctor.

(Dialogue event isn’t implemented yet. This demo will end after the current event)

・Added Int and Str bars. Upgrading and upgrade resources aren’t implemented yet.

・Charging while going into stealth mode is quite buggy.

When you get out of stealth mode while charging, the action will be carried out right after coming out.

・You may now skip the first entrance event by pressing Confirm.

・You may move diagonally now.

・Various bugfix.

v0.72 Demo

・Added Storage room, Clinic Corridor and Cafeteria Corridor

・Added Security Camera, Security Soldiers

・You may now hide under desks.

・Flamethrower will also burn objects.

・Security Soldiers’ sex animation .

・Fixed attack.

v0.65 Demo

・Bug (digital) fix patch

v0.6 Demo

・Implemented Charge Attacks

・Changed the behavior of the security drone, now the drone can be destroyed when exhausting.

・Added HP gauge; when HP reaches 0, the game is over. In the future, the player will be revived in the base after it’s built.

・The UI of the title screen was slightly changed for better understanding.

Charge attacks can be used to capture enemies from any direction as long as the alien is not seen. Charge attacks will be a skill acquired after leveling up in the future.

v0.4 Demo

・Alien attack effects are displayed.

・Fixed a bug that prevented attacks from hitting.

・Fixed a bug related to area movement.

v0.0 Demo

First release

Developer Notes:

At the beginning of the game, please use left and right arrow key to switch language.

The game is Japanese by default.

If the text is not showing, please use Locale Emulator.

Virus is a false alarm, proven by a lot of players already.