About the Game
<Story>
A long time ago, an unknown meteorite came to earth. The meteorite was sleeping quietly deep in the earth, waiting for the time to wake up.
10,000 years have passed, and when humans have built civilization, a change occurs in the meteorite.
Countless alien "breeds" are born from the meteorite and quickly devour the planet.
The true identity of the meteorite was the egg of an alien life form.
The land above is destroyed, and national functions disappear. Humanity is defeated.
Those left behind are forced to live in sturdy underground shelters.
The shelter was named "Ark" and became humanity's last stronghold.
In order to take back the land, humanity has gathered its wisdom and materials and developed two "anti-bleed" combat weapons.
One is the manned weapon “Father”
One is a combat clone soldier with the appearance of a girl who becomes Father's pilot.
They live in a deserted front-line base and then go off to fight.
<Experience>
9th Sentinel Sisters is a casual action game with roguelite elements. You can easily and easily enjoy the exhilarating feeling of wiping out aliens in a desolate near-future atmosphere.
・Create your own build with 16 types of weapons and 37 types of reinforcement parts!
You can experience the exhilarating feeling of defeating a large number of approaching aliens with powerful weapons such as lasers, drills, and missiles.
・Decide the strategy route
Whether you want to take on strong enemies, strengthen your weapons, or recover damage, assess the situation and aim to clear the game!
・The mission for each stage is simple
You can concentrate and enjoy it in a short period of time.
・Choose a hero and enjoy various strategies.
<Game Features>
Roguelite casual action
Side view Twin stick
A post-apocalyptic world destroyed by aliens and a fighting girl
16 types of weapons
37 types of reinforced parts
6 heroes
Full controller
Screenshots
13 images
Version Information
Steam Patch Notes
Official update history
Thank you for playing "9th Sentinel Sisters."
[p align="start"]We have fixed the issues that occurred in Version 1.1.1.[p align="start"]We hope you continue to enjoy "9th Sentinel Sisters."
Fixed an issue where clicking “Back” in the communication log did not respond when using keyboard/mouse controls.
Thank you for playing "9th Sentinel Sisters."
[p align="start"]We have fixed the issues that occurred in Version 1.1.0.[p align="start"]We hope you continue to enjoy "9th Sentinel Sisters."
Fixed an issue where the initial setting for left-click behavior was incorrect.
Fixed other minor bugs.
This mini-update mainly improves the tempo and difficulty of the early stages of the game, as well as the playing environment.
Player
- The initial movement speed of the player's ship has been increased.
- Reduced experience required to level up.
Battle and enemy
- Reduced the time limit for battles caused by enemy reactions in the early to mid stages of the operation.
- Shortened the time limit for Threatening Enemy Reaction battles.
- Adjustments have been made to ease the appearance pattern and number of enemy appearances in battles in the early to mid stages of the operation.
- The movement speed of enemies moving at high speed has been slowed down.
Graphics
- Aim guides indicating the direction of fire are now displayed around your ship.
- Adjusted the background of battles caused by Threatening Enemy Reaction.
- The UI of the rank-up button in aircraft and weapon modifications has been adjusted.
Added optional items
- Added an item for adjusting the dead zone when using the gamepad in the options.
Bug fixes
- Fixed typos in the Iai blade description text.
Current Release
Build 21186121
Uploaded Jul 09, 2026
System Requirements
How to Install
SentinelSisters.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
564 MB
21186121
6614049E
0221e922d09b4c3de95e618f55e93da5088b564524d704d37fe7b4e4c37dc725
You May Also Like
View AllDownload 9th Sentinel Sisters for PC with a direct link or via torrent. Get the full version of 9th Sentinel Sisters for free. 9th Sentinel Sisters is a Action released by Live Wire.