The Game Census
9th Sentinel Sisters cover art

9th Sentinel Sisters

Live Wire · 2025-09-10

Steam

ActionCasualIndie

Modes: Single player · Perspectives: Bird view / Isometric

Releases: Oct 05, 2023 (PC (Microsoft Windows))

The battle of the clone girls unfolds on a post-apocalyptic Earth, devastated by the alien life form known as "Bleed." Pilot the manned weapon "Father" to eliminate enemies. Upgrade weapons, create powerful builds, and strategize to successfully clear stages.

9th Sentinel Sisters is an Action, Casual, and Indie game released in 2025, priced at $7.99, with an owner estimate of 50,000 .. 100,000 and a Mostly Positive review sentiment (70% of 282 reviews).

0
playing now
70%
positive of 282 reviews
Mostly Positive
steam's rating (official)
50,000–100,000
owners (SteamSpy est.)
pending
deck/linux tier (ProtonDB)
Verified
Steam Deck (Valve)
SteamOS: Playable
$7.99
steam price (US)

0 players in-game as of 2026-10-14 19:00 UTC (census sample)

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 humani(Storyline via IGDB)

Health check

Quiet
  • · 0 players in-game at the last census sample.
  • · 15 reviews in the last 8 weeks (~2/week).
  • · Review velocity down 58% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (148 reviews).
  • · Top 26% of 27,912 Action games in the census by review count.

Health tier since 2026-09-01

Estimated sales: 5.6k–13k copies

Review-multiple estimate from 282 total reviews — how this is computed.

All-time low: $3.19 at Steam (2026-06-25)via IsThereAnyDeal

12-month high $7.99 · on sale 3 of 6 observed days (census price snapshots)

Review momentum

PositiveNegative
11511520232026Week of 2023-10-01: 115 positiveWeek of 2023-10-01: 33 negativeWeek of 2023-11-01: 16 positiveWeek of 2023-11-01: 2 negativeWeek of 2023-12-01: 9 positiveWeek of 2023-12-01: 1 negativeWeek of 2024-01-01: 3 positiveWeek of 2024-01-01: 2 negativeWeek of 2024-02-01: 5 positiveWeek of 2024-03-01: 6 positiveWeek of 2024-03-01: 1 negativeWeek of 2024-04-01: 2 positiveWeek of 2024-04-01: 5 negativeWeek of 2024-05-01: 2 positiveWeek of 2024-05-01: 1 negativeWeek of 2024-06-01: 1 positiveWeek of 2024-06-01: 1 negativeWeek of 2024-07-01: 2 positiveWeek of 2024-07-01: 3 negativeWeek of 2024-08-01: 2 negativeWeek of 2024-09-01: 5 positiveWeek of 2024-10-01: 2 positiveWeek of 2024-10-01: 5 negativeWeek of 2024-11-01: 1 positiveWeek of 2024-12-01: 1 positiveWeek of 2024-12-01: 6 negativeWeek of 2025-01-01: 1 positiveWeek of 2025-01-01: 1 negativeWeek of 2025-02-01: 1 positiveWeek of 2025-02-01: 4 negativeWeek of 2025-03-01: 1 positiveWeek of 2025-03-01: 1 negativeWeek of 2025-04-01: 1 positiveWeek of 2025-05-01: 1 negativeWeek of 2025-06-01: 1 positiveWeek of 2025-06-01: 2 negativeWeek of 2025-07-01: 1 negativeWeek of 2025-08-01: 3 negativeWeek of 2025-09-01: 13 positiveWeek of 2025-09-01: 7 negativeWeek of 2025-10-01: 2 positiveWeek of 2025-10-01: 1 negativeWeek of 2025-11-01: 2 positiveWeek of 2025-11-01: 1 negativeWeek of 2025-12-01: 1 positiveWeek of 2025-12-01: 1 negativeWeek of 2026-01-01: 2 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-03-01: 2 positiveWeek of 2026-04-01: 1 positiveWeek of 2026-05-01: 1 positiveWeek of 2026-07-01: 1 positiveWeek of 2026-07-01: 1 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

202026-09-15 20:00 — 0 players2026-09-17 04:00 — 0 players2026-09-18 11:00 — 0 players2026-09-19 19:00 — 0 players2026-09-21 02:00 — 0 players2026-09-22 10:00 — 0 players2026-09-23 18:00 — 0 players2026-09-25 01:00 — 0 players2026-09-26 09:00 — 0 players2026-09-27 16:00 — 0 players2026-09-29 00:00 — 0 players2026-09-30 07:00 — 1 players2026-10-01 15:00 — 0 players2026-10-02 22:00 — 0 players2026-10-04 06:00 — 0 players2026-10-05 14:00 — 1 players2026-10-06 21:00 — 0 players2026-10-08 05:00 — 0 players2026-10-09 12:00 — 0 players2026-10-10 20:00 — 0 players2026-10-12 04:00 — 0 players2026-10-13 11:00 — 1 players2026-10-14 19:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).
312Oct 2023Oct 2025Oct 2023 — avg 31 · peak 155Nov 2023 — avg 7 · peak 28Dec 2023 — avg 7 · peak 38Jan 2024 — avg 7 · peak 24Feb 2024 — avg 6 · peak 24Mar 2024 — avg 7 · peak 22Apr 2024 — avg 5 · peak 21May 2024 — avg 3 · peak 8Jun 2024 — avg 2 · peak 9Aug 2024 — avg 2 · peak 7Sep 2025 — avg 17 · peak 68Oct 2025 — avg 3 · peak 12

▼ −14 avg players (−82.2%) vs prior month — Oct 2025

Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Price history

$7.99$3.192023-10-062026-07-092023-10-06 — best price $4.992025-09-11 — best price $7.992025-12-18 — best price $3.992026-01-05 — best price $7.992026-03-19 — best price $3.992026-03-26 — best price $7.992026-06-25 — best price $3.192026-07-09 — best price $7.99
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

55
achievements tracked
98%
earned "The first step"
58.9%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsFull controller supportSingle-playerSteam AchievementsFull controller supportSteam CloudFamily Sharing

4 supported languages: Japanese, English, Simplified Chinese, Traditional Chinese

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)921%55

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

2.5DDarkActionSci-fiControllerFuturisticRogue-liteAtmosphericEarly AccessChoices Matter

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

TanziaForgotton AnneDude SimulatorEternity: The Last UnicornApsulov: End of GodsTorchlight III

Similarity via IGDB.

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