The Game Census
39 Days to Mars cover art

39 Days to Mars

It's Anecdotal · 2018-04-25

SteamPlayStation StoreMicrosoft Store

AdventureIndie

Modes: Single player, Multiplayer, Co-operative · Perspectives: Side view

Releases: Oct 31, 2019 (PlayStation 4), May 16, 2019 (Nintendo Switch), Apr 25, 2018 (PC (Microsoft Windows)), Feb 06, 2019 (Xbox One), Apr 25, 2018 (Mac), Apr 25, 2018 (Linux)

Embark on the 19th century's most unreliable spaceship in this 2 player couch co-op adventure. 39 Days to Mars is a unique game designed to be played with a friend, where both players have important roles in the expedition. Solo players are aided by the computer-controlled ship's cat.

39 Days to Mars is an Adventure and Indie game released in 2018, priced at $13.39, with an estimated 50,000 to 100,000 owners and a Very Positive review sentiment (85% of 334 reviews).

1
playing now
85%
positive of 334 reviews
Very Positive
steam's rating (official)
50,000–100,000
owners (SteamSpy est.)
70/100
critic score (2 outlets, IGDB)
70/100
IGDB user rating (6 ratings)
4.14★
PlayStation Store rating (70 ratings)
Playable
Steam Deck (Valve)
SteamOS: Playable
$13.39
steam price (US)

1 players in-game as of 2026-10-14 18:00 UTC (census sample)

Health check

Quiet
  • · 1 players in-game at the last census sample.
  • · 16 reviews in the last 8 weeks (~2/week).
  • · Review velocity up 23% vs the prior 8 weeks.
  • · Top 23% of 28,771 Adventure games in the census by review count.

Health tier since 2026-09-01

Estimated sales: 8.3k–20k copies

Review-multiple estimate from 334 total reviews — how this is computed.

Current store prices

Microsoft Store$13.39-33%

Deal snapshots via CheapShark, refreshed daily.

All-time low: $5.24 at MacGameStore (2021-07-08)via IsThereAnyDeal

12-month high $19.99 · on sale 9 of 22 observed days (census price snapshots)

Review momentum

PositiveNegative
121220182026Week of 2018-04-01: 8 positiveWeek of 2018-05-01: 10 positiveWeek of 2018-05-01: 1 negativeWeek of 2018-06-01: 3 positiveWeek of 2018-06-01: 1 negativeWeek of 2018-07-01: 5 positiveWeek of 2018-07-01: 4 negativeWeek of 2018-08-01: 2 positiveWeek of 2018-09-01: 5 positiveWeek of 2018-09-01: 1 negativeWeek of 2018-11-01: 2 positiveWeek of 2018-12-01: 2 positiveWeek of 2018-12-01: 2 negativeWeek of 2019-01-01: 1 negativeWeek of 2019-02-01: 4 positiveWeek of 2019-03-01: 1 positiveWeek of 2019-05-01: 1 positiveWeek of 2019-05-01: 1 negativeWeek of 2019-06-01: 3 positiveWeek of 2019-07-01: 6 positiveWeek of 2019-07-01: 1 negativeWeek of 2019-08-01: 3 positiveWeek of 2019-09-01: 1 positiveWeek of 2019-11-01: 4 positiveWeek of 2019-12-01: 1 positiveWeek of 2020-01-01: 5 positiveWeek of 2020-01-01: 1 negativeWeek of 2020-02-01: 3 positiveWeek of 2020-03-01: 5 positiveWeek of 2020-03-01: 1 negativeWeek of 2020-04-01: 5 positiveWeek of 2020-04-01: 1 negativeWeek of 2020-05-01: 12 positiveWeek of 2020-05-01: 1 negativeWeek of 2020-06-01: 2 positiveWeek of 2020-07-01: 2 positiveWeek of 2020-07-01: 2 negativeWeek of 2020-08-01: 1 positiveWeek of 2020-08-01: 1 negativeWeek of 2020-09-01: 1 positiveWeek of 2020-09-01: 1 negativeWeek of 2020-10-01: 1 positiveWeek of 2020-11-01: 2 positiveWeek of 2020-12-01: 1 positiveWeek of 2020-12-01: 1 negativeWeek of 2021-01-01: 6 positiveWeek of 2021-02-01: 3 positiveWeek of 2021-03-01: 2 positiveWeek of 2021-04-01: 1 positiveWeek of 2021-05-01: 2 positiveWeek of 2021-07-01: 4 positiveWeek of 2021-09-01: 5 positiveWeek of 2021-10-01: 1 positiveWeek of 2021-11-01: 1 positiveWeek of 2021-12-01: 1 positiveWeek of 2022-01-01: 2 positiveWeek of 2022-02-01: 3 positiveWeek of 2022-03-01: 8 positiveWeek of 2022-04-01: 4 positiveWeek of 2022-05-01: 1 positiveWeek of 2022-05-01: 1 negativeWeek of 2022-07-01: 1 positiveWeek of 2022-07-01: 2 negativeWeek of 2022-08-01: 3 positiveWeek of 2022-08-01: 1 negativeWeek of 2022-09-01: 3 positiveWeek of 2022-09-01: 1 negativeWeek of 2022-10-01: 4 positiveWeek of 2022-11-01: 5 positiveWeek of 2022-12-01: 1 positiveWeek of 2023-01-01: 2 positiveWeek of 2023-02-01: 3 positiveWeek of 2023-02-01: 1 negativeWeek of 2023-03-01: 1 positiveWeek of 2023-03-01: 2 negativeWeek of 2023-05-01: 1 positiveWeek of 2023-05-01: 1 negativeWeek of 2023-06-01: 1 positiveWeek of 2023-06-01: 1 negativeWeek of 2023-07-01: 2 positiveWeek of 2023-07-01: 1 negativeWeek of 2023-08-01: 1 positiveWeek of 2023-09-01: 2 positiveWeek of 2023-09-01: 1 negativeWeek of 2023-10-01: 2 positiveWeek of 2023-11-01: 1 positiveWeek of 2023-11-01: 1 negativeWeek of 2023-12-01: 1 positiveWeek of 2024-02-01: 1 positiveWeek of 2024-03-01: 1 positiveWeek of 2024-05-01: 1 positiveWeek of 2024-07-01: 1 positiveWeek of 2024-08-01: 1 positiveWeek of 2024-09-01: 1 negativeWeek of 2024-10-01: 1 positiveWeek of 2024-12-01: 1 positiveWeek of 2025-01-01: 2 positiveWeek of 2025-02-01: 1 positiveWeek of 2025-02-01: 1 negativeWeek of 2025-03-01: 1 positiveWeek of 2025-04-01: 2 positiveWeek of 2025-05-01: 1 positiveWeek of 2025-06-01: 1 positiveWeek of 2025-06-01: 1 negativeWeek of 2025-08-01: 2 positiveWeek of 2025-09-01: 1 positiveWeek of 2025-12-01: 1 positiveWeek of 2025-12-01: 1 negativeWeek of 2026-01-01: 2 positiveWeek of 2026-02-01: 2 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-03-01: 1 negativeWeek of 2026-05-01: 3 positiveWeek of 2026-06-01: 1 positiveWeek of 2026-07-01: 3 positiveWeek of 2026-08-01: 1 positiveWeek of 2026-08-01: 1 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

202026-09-15 04:00 — 0 players2026-09-16 12:00 — 0 players2026-09-17 19:00 — 0 players2026-09-19 03:00 — 0 players2026-09-20 10:00 — 0 players2026-09-21 18:00 — 0 players2026-09-23 02:00 — 0 players2026-09-24 09:00 — 0 players2026-09-25 17:00 — 0 players2026-09-27 00:00 — 0 players2026-09-28 08:00 — 0 players2026-09-29 15:00 — 0 players2026-09-30 23:00 — 0 players2026-10-02 06:00 — 2 players2026-10-03 14:00 — 2 players2026-10-04 22:00 — 0 players2026-10-06 05:00 — 0 players2026-10-07 13:00 — 0 players2026-10-08 20:00 — 0 players2026-10-10 04:00 — 0 players2026-10-11 11:00 — 0 players2026-10-12 19:00 — 0 players2026-10-14 03:00 — 0 players2026-10-14 18:00 — 1 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$19.99$7.492018-04-252026-10-102018-04-25 — best price $12.002018-07-06 — best price $15.002018-10-11 — best price $11.992018-11-21 — best price $11.242019-01-03 — best price $14.992019-02-18 — best price $14.992019-05-23 — best price $15.002019-07-18 — best price $10.042019-09-12 — best price $15.002019-11-11 — best price $14.992020-01-02 — best price $14.992020-01-14 — best price $10.052020-03-09 — best price $14.992020-05-21 — best price $15.002020-11-25 — best price $10.042021-01-28 — best price $10.042021-03-25 — best price $10.042021-06-24 — best price $10.042021-09-20 — best price $14.992021-11-24 — best price $10.042022-02-07 — best price $14.992022-07-07 — best price $14.992022-11-11 — best price $14.992023-01-05 — best price $14.992023-06-12 — best price $14.992023-09-04 — best price $14.992024-01-04 — best price $14.992024-04-01 — best price $14.992024-07-15 — best price $13.392024-11-27 — best price $13.392025-02-10 — best price $13.392025-05-06 — best price $13.392025-10-06 — best price $19.992026-02-23 — best price $19.992026-07-09 — best price $19.992026-09-12 — best price $19.992026-10-10 — best price $13.39
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

23
achievements tracked
58%
earned "Snag"
14.3%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxFull controller supportSingle-playerMulti-playerCo-opShared/Split Screen Co-opShared/Split ScreenSteam AchievementsFull controller supportSteam Trading CardsColor AlternativesStereo Sound

11 supported languages: English, French, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Traditional Chinese, Italian

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)3903%23
Xbox One (Xbox)1614%23
PS4 (PlayStation)8919%24
Switch (Nintendo)30%0
PS4 (PlayStation)333%24

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

Player tags

2DCo-opPuzzlePhysicsAdventureSteampunkControllerHand-drawnAtmosphericLocal Co-Op

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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