The Game Census
Monster Line of Defense cover art

Monster Line of Defense

No.25 · 2023-09-22

Steam

Casual

Modes: Single player

Releases: Sep 22, 2023 (PC (Microsoft Windows))

"Monster Line of Defense" is a casual shooting game. Clicking the left mouse button allows the player to fire and shoot the monsters approaching from the front.

Monster Line of Defense is a 2023 Casual priced at $1.99, with an estimated owner base of 20,000 .. 50,000 and a Very Positive review sentiment (94% of 189 reviews).

0
playing now
93%
positive of 190 reviews
Very Positive
steam's rating (official)
20,000–50,000
owners (SteamSpy est.)
$1.99
steam price (US)

0 players in-game as of 2026-10-14 23:00 UTC (census sample)

Health check

Quiet
  • · 0 players in-game at the last census sample.
  • · 18 reviews in the last 8 weeks (~2/week).
  • · Review velocity up 6% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (96 reviews).
  • · Top 22% of 29,190 Casual games in the census by review count.
Estimated sales: 3.8k–8.6k copies

Review-multiple estimate from 190 total reviews — how this is computed.

All-time low: $1.19 at Steam (2025-09-29)via IsThereAnyDeal

12-month high $1.99 · on sale 7 of 15 observed days (census price snapshots)

Review momentum

PositiveNegative
959520232026Week of 2023-09-01: 95 positiveWeek of 2023-09-01: 1 negativeWeek of 2023-10-01: 8 positiveWeek of 2023-10-01: 4 negativeWeek of 2023-11-01: 14 positiveWeek of 2023-12-01: 7 positiveWeek of 2024-01-01: 7 positiveWeek of 2024-01-01: 1 negativeWeek of 2024-02-01: 5 positiveWeek of 2024-02-01: 1 negativeWeek of 2024-03-01: 4 positiveWeek of 2024-04-01: 2 positiveWeek of 2024-05-01: 2 positiveWeek of 2024-06-01: 1 negativeWeek of 2024-07-01: 2 negativeWeek of 2024-08-01: 1 positiveWeek of 2024-09-01: 5 positiveWeek of 2024-10-01: 3 positiveWeek of 2024-11-01: 1 positiveWeek of 2025-01-01: 1 positiveWeek of 2025-02-01: 3 positiveWeek of 2025-03-01: 1 positiveWeek of 2025-04-01: 3 positiveWeek of 2025-07-01: 2 positiveWeek of 2025-09-01: 1 positiveWeek of 2025-10-01: 3 positiveWeek of 2025-12-01: 2 positiveWeek of 2026-01-01: 5 positiveWeek of 2026-03-01: 1 negativeWeek of 2026-06-01: 2 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

102026-09-15 08:00 — 0 players2026-09-16 16:00 — 0 players2026-09-18 00:00 — 0 players2026-09-19 07:00 — 0 players2026-09-20 15:00 — 0 players2026-09-21 23:00 — 0 players2026-09-23 06:00 — 0 players2026-09-24 14:00 — 0 players2026-09-25 21:00 — 0 players2026-09-27 05:00 — 1 players2026-09-28 12:00 — 0 players2026-09-29 20:00 — 0 players2026-10-01 03:00 — 0 players2026-10-02 11:00 — 1 players2026-10-03 18:00 — 0 players2026-10-05 02:00 — 0 players2026-10-06 10:00 — 1 players2026-10-07 17:00 — 0 players2026-10-09 01:00 — 0 players2026-10-10 08:00 — 0 players2026-10-11 16:00 — 0 players2026-10-13 00:00 — 0 players2026-10-14 07:00 — 0 players2026-10-14 23:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$1.99$1.192023-09-222026-07-272023-09-22 — best price $1.592023-11-06 — best price $1.792023-11-21 — best price $1.692023-12-22 — best price $1.592024-01-08 — best price $1.592024-02-19 — best price $1.692024-03-14 — best price $1.492024-04-08 — best price $1.692024-05-20 — best price $1.592024-06-27 — best price $1.392024-07-15 — best price $1.392024-09-02 — best price $1.372024-10-14 — best price $1.352024-11-27 — best price $1.332024-12-19 — best price $1.312025-01-06 — best price $1.292025-02-17 — best price $1.292025-03-13 — best price $1.272025-03-31 — best price $1.252025-05-12 — best price $1.232025-06-27 — best price $1.212025-07-21 — best price $1.212025-09-01 — best price $1.212025-09-29 — best price $1.192025-10-13 — best price $1.192025-11-24 — best price $1.192025-12-18 — best price $1.192026-03-19 — best price $1.192026-03-30 — best price $1.492026-05-11 — best price $1.692026-06-25 — best price $1.392026-07-20 — best price $1.592026-07-27 — best price $1.99
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

18
achievements tracked
98.3%
earned "Start the game."
54%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerFamily Sharing1 DLC

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

Post-launch support: 1 DLC released, first 2023-08-31 (Steam store data)

Player tags

2DNSFWAnimeCasualCombatHentaiLinearMatureNudityShooter

Census log

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

Players also track

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Similarity via IGDB.

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