The Game Census
SUNLESS SEA cover art

SUNLESS SEA

Failbetter Games · 2015-02-06

SteamGOGEpic Games Store

AdventureIndieRPG

Modes: Single player

Releases: Feb 25, 2016 (Linux), Mar 23, 2017 (iOS), Feb 06, 2015 (Mac), Feb 06, 2015 (PC (Microsoft Windows))

LOSE YOUR MIND. EAT YOUR CREW. DIE. Take the helm of your steamship and set sail for the unknown! Sunless Sea is a game of discovery, loneliness and frequent death, set in the award-winning Victorian Gothic universe of Fallen London.

87
playing now
83%
positive of 9.6k reviews
Very Positive
steam rating
1,000,000–2,000,000
owners (SteamSpy est.)
85/100
critic score (4 outlets, IGDB)
76/100
IGDB user rating (80 ratings)
62h
to beat · rushed 22h · completionist 124h
gold
deck/linux tier (ProtonDB)
$18.99
steam price (US)

87 players in-game as of 2026-08-30 17:00 UTC (census sample)

Sunless Sea is a survival/exploration role-playing video game with roguelike elements developed by Failbetter Games. The game was released on 6 February 2015 for Windows and OS X following a successful Kickstarter campaign to crowdfund the project. The game takes place in the universe of Failbetter's browser adventure game Fallen London, in which Victorian-era London has been moved beneath the Earth's surface to the edge of the Unterzee, a vast underground ocean. On 11 October 2016, the game's first downloadable content Zubmariner was released, which allows players to explore beneath the surface of the "zee". A sequel, Sunless Skies, was announced in September 2016. It surpassed its funding goals on Kickstarter and was released on 31 January 2019.

Health check

Quietly active
  • · 87 players in-game at the last census sample.
  • · 119 reviews in the last 8 weeks (~15/week).
  • · Review velocity down 21% vs the prior 8 weeks.
  • · Top 8% of 11,404 Adventure games in the census by review count.

Health tier since 2026-08-29

Estimated sales: 239k–573k copies

Review-multiple estimate from 9,552 total reviews — how this is computed.

Current store prices

GOG$18.99
lowest across shops (ITAD)$18.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $4.74 at GOG (2019-01-17) · bundled 3×via IsThereAnyDeal

12-month high $18.99 · on sale 25 of 45 observed days · $14.25 above the all-time low (census price snapshots)

Review momentum

PositiveNegative
14714720182026Week of 2018-01-01: 52 positiveWeek of 2018-01-01: 15 negativeWeek of 2018-02-01: 34 positiveWeek of 2018-02-01: 7 negativeWeek of 2018-03-01: 18 positiveWeek of 2018-03-01: 10 negativeWeek of 2018-04-01: 15 positiveWeek of 2018-04-01: 7 negativeWeek of 2018-05-01: 26 positiveWeek of 2018-05-01: 7 negativeWeek of 2018-06-01: 29 positiveWeek of 2018-06-01: 13 negativeWeek of 2018-07-01: 55 positiveWeek of 2018-07-01: 7 negativeWeek of 2018-08-01: 20 positiveWeek of 2018-08-01: 4 negativeWeek of 2018-09-01: 25 positiveWeek of 2018-09-01: 4 negativeWeek of 2018-10-01: 28 positiveWeek of 2018-10-01: 7 negativeWeek of 2018-11-01: 147 positiveWeek of 2018-11-01: 8 negativeWeek of 2018-12-01: 35 positiveWeek of 2018-12-01: 11 negativeWeek of 2019-01-01: 48 positiveWeek of 2019-01-01: 17 negativeWeek of 2019-02-01: 45 positiveWeek of 2019-02-01: 17 negativeWeek of 2019-03-01: 22 positiveWeek of 2019-03-01: 9 negativeWeek of 2019-04-01: 17 positiveWeek of 2019-04-01: 7 negativeWeek of 2019-05-01: 20 positiveWeek of 2019-05-01: 6 negativeWeek of 2019-06-01: 80 positiveWeek of 2019-06-01: 8 negativeWeek of 2019-07-01: 72 positiveWeek of 2019-07-01: 7 negativeWeek of 2019-08-01: 21 positiveWeek of 2019-08-01: 5 negativeWeek of 2019-09-01: 16 positiveWeek of 2019-09-01: 5 negativeWeek of 2019-10-01: 27 positiveWeek of 2019-10-01: 7 negativeWeek of 2019-11-01: 104 positiveWeek of 2019-11-01: 12 negativeWeek of 2019-12-01: 82 positiveWeek of 2019-12-01: 6 negativeWeek of 2020-01-01: 52 positiveWeek of 2020-01-01: 10 negativeWeek of 2020-02-01: 34 positiveWeek of 2020-02-01: 7 negativeWeek of 2020-03-01: 50 positiveWeek of 2020-03-01: 5 negativeWeek of 2020-04-01: 55 positiveWeek of 2020-04-01: 7 negativeWeek of 2020-05-01: 60 positiveWeek of 2020-05-01: 8 negativeWeek of 2020-06-01: 42 positiveWeek of 2020-06-01: 6 negativeWeek of 2020-07-01: 43 positiveWeek of 2020-07-01: 7 negativeWeek of 2020-08-01: 33 positiveWeek of 2020-08-01: 2 negativeWeek of 2020-09-01: 32 positiveWeek of 2020-09-01: 11 negativeWeek of 2020-10-01: 34 positiveWeek of 2020-10-01: 11 negativeWeek of 2020-11-01: 39 positiveWeek of 2020-11-01: 10 negativeWeek of 2020-12-01: 46 positiveWeek of 2020-12-01: 4 negativeWeek of 2021-01-01: 36 positiveWeek of 2021-01-01: 7 negativeWeek of 2021-02-01: 35 positiveWeek of 2021-02-01: 2 negativeWeek of 2021-03-01: 39 positiveWeek of 2021-03-01: 7 negativeWeek of 2021-04-01: 36 positiveWeek of 2021-04-01: 6 negativeWeek of 2021-05-01: 33 positiveWeek of 2021-05-01: 3 negativeWeek of 2021-06-01: 34 positiveWeek of 2021-06-01: 11 negativeWeek of 2021-07-01: 40 positiveWeek of 2021-07-01: 11 negativeWeek of 2021-08-01: 22 positiveWeek of 2021-08-01: 3 negativeWeek of 2021-09-01: 18 positiveWeek of 2021-10-01: 27 positiveWeek of 2021-10-01: 7 negativeWeek of 2021-11-01: 31 positiveWeek of 2021-11-01: 8 negativeWeek of 2021-12-01: 26 positiveWeek of 2021-12-01: 4 negativeWeek of 2022-01-01: 36 positiveWeek of 2022-01-01: 3 negativeWeek of 2022-02-01: 28 positiveWeek of 2022-02-01: 9 negativeWeek of 2022-03-01: 13 positiveWeek of 2022-03-01: 4 negativeWeek of 2022-04-01: 21 positiveWeek of 2022-04-01: 2 negativeWeek of 2022-05-01: 32 positiveWeek of 2022-05-01: 6 negativeWeek of 2022-06-01: 25 positiveWeek of 2022-06-01: 10 negativeWeek of 2022-07-01: 27 positiveWeek of 2022-07-01: 8 negativeWeek of 2022-08-01: 16 positiveWeek of 2022-08-01: 8 negativeWeek of 2022-09-01: 23 positiveWeek of 2022-09-01: 5 negativeWeek of 2022-10-01: 20 positiveWeek of 2022-10-01: 4 negativeWeek of 2022-11-01: 28 positiveWeek of 2022-11-01: 4 negativeWeek of 2022-12-01: 25 positiveWeek of 2022-12-01: 6 negativeWeek of 2023-01-01: 22 positiveWeek of 2023-01-01: 10 negativeWeek of 2023-02-01: 20 positiveWeek of 2023-02-01: 5 negativeWeek of 2023-03-01: 21 positiveWeek of 2023-03-01: 5 negativeWeek of 2023-04-01: 31 positiveWeek of 2023-04-01: 5 negativeWeek of 2023-05-01: 29 positiveWeek of 2023-05-01: 6 negativeWeek of 2023-06-01: 21 positiveWeek of 2023-06-01: 13 negativeWeek of 2023-07-01: 27 positiveWeek of 2023-07-01: 8 negativeWeek of 2023-08-01: 15 positiveWeek of 2023-08-01: 7 negativeWeek of 2023-09-01: 16 positiveWeek of 2023-09-01: 5 negativeWeek of 2023-10-01: 18 positiveWeek of 2023-10-01: 2 negativeWeek of 2023-11-01: 25 positiveWeek of 2023-11-01: 6 negativeWeek of 2023-12-01: 18 positiveWeek of 2023-12-01: 4 negativeWeek of 2024-01-01: 26 positiveWeek of 2024-01-01: 6 negativeWeek of 2024-02-01: 22 positiveWeek of 2024-02-01: 5 negativeWeek of 2024-03-01: 21 positiveWeek of 2024-03-01: 4 negativeWeek of 2024-04-01: 22 positiveWeek of 2024-04-01: 3 negativeWeek of 2024-05-01: 13 positiveWeek of 2024-05-01: 1 negativeWeek of 2024-06-01: 12 positiveWeek of 2024-06-01: 1 negativeWeek of 2024-07-01: 23 positiveWeek of 2024-07-01: 5 negativeWeek of 2024-08-01: 16 positiveWeek of 2024-08-01: 2 negativeWeek of 2024-09-01: 20 positiveWeek of 2024-09-01: 5 negativeWeek of 2024-10-01: 12 positiveWeek of 2024-10-01: 3 negativeWeek of 2024-11-01: 24 positiveWeek of 2024-11-01: 4 negativeWeek of 2024-12-01: 23 positiveWeek of 2024-12-01: 7 negativeWeek of 2025-01-01: 20 positiveWeek of 2025-01-01: 4 negativeWeek of 2025-02-01: 18 positiveWeek of 2025-02-01: 9 negativeWeek of 2025-03-01: 24 positiveWeek of 2025-03-01: 2 negativeWeek of 2025-04-01: 18 positiveWeek of 2025-04-01: 4 negativeWeek of 2025-05-01: 15 positiveWeek of 2025-05-01: 2 negativeWeek of 2025-06-01: 20 positiveWeek of 2025-06-01: 2 negativeWeek of 2025-07-01: 25 positiveWeek of 2025-07-01: 2 negativeWeek of 2025-08-01: 12 positiveWeek of 2025-08-01: 3 negativeWeek of 2025-09-01: 6 positiveWeek of 2025-10-01: 18 positiveWeek of 2025-10-01: 4 negativeWeek of 2025-11-01: 15 positiveWeek of 2025-11-01: 4 negativeWeek of 2025-12-01: 12 positiveWeek of 2025-12-01: 2 negativeWeek of 2026-01-01: 15 positiveWeek of 2026-01-01: 4 negativeWeek of 2026-02-01: 12 positiveWeek of 2026-02-01: 5 negativeWeek of 2026-03-01: 14 positiveWeek of 2026-03-01: 4 negativeWeek of 2026-04-01: 12 positiveWeek of 2026-04-01: 4 negativeWeek of 2026-05-01: 10 positiveWeek of 2026-05-01: 3 negativeWeek of 2026-06-01: 7 positiveWeek of 2026-06-01: 1 negativeWeek of 2026-07-01: 12 positiveWeek of 2026-07-01: 2 negativeWeek of 2026-08-01: 18 positiveWeek of 2026-08-01: 5 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

102222026-08-06 21:00 — 43 players2026-08-07 05:00 — 26 players2026-08-07 13:00 — 32 players2026-08-07 21:00 — 46 players2026-08-08 05:00 — 23 players2026-08-08 13:00 — 42 players2026-08-08 21:00 — 47 players2026-08-09 05:00 — 31 players2026-08-09 13:00 — 54 players2026-08-09 21:00 — 58 players2026-08-10 05:00 — 22 players2026-08-10 13:00 — 40 players2026-08-10 21:00 — 66 players2026-08-11 05:00 — 36 players2026-08-11 13:00 — 51 players2026-08-12 21:00 — 64 players2026-08-14 05:00 — 57 players2026-08-15 12:00 — 59 players2026-08-16 20:00 — 91 players2026-08-18 04:00 — 57 players2026-08-19 11:00 — 62 players2026-08-20 19:00 — 96 players2026-08-22 02:00 — 73 players2026-08-23 10:00 — 77 players2026-08-24 18:00 — 90 players2026-08-26 02:00 — 63 players2026-08-27 10:00 — 37 players2026-08-28 17:00 — 59 players2026-08-30 01:00 — 68 players2026-08-30 17:00 — 87 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$18.99$5.692015-01-012026-08-302015-01-01 — best price $15.192015-05-20 — best price $18.992015-06-18 — best price $18.992015-09-14 — best price $18.992015-12-13 — best price $18.992016-06-08 — best price $9.492016-11-29 — best price $18.992017-03-02 — best price $6.262017-07-21 — best price $5.692017-12-12 — best price $5.692018-03-12 — best price $6.492018-07-20 — best price $6.452018-10-29 — best price $6.452018-12-20 — best price $6.452019-05-10 — best price $7.592019-07-30 — best price $9.492019-11-06 — best price $6.452020-01-22 — best price $6.452020-05-27 — best price $6.492020-12-22 — best price $6.452021-06-09 — best price $6.452021-11-01 — best price $18.992021-12-11 — best price $18.992022-03-21 — best price $6.452022-06-17 — best price $18.992022-11-29 — best price $18.992023-03-23 — best price $18.992023-11-02 — best price $18.992024-02-14 — best price $6.452024-10-15 — best price $6.452025-01-24 — best price $6.452025-05-01 — best price $18.992025-09-11 — best price $18.992025-12-18 — best price $6.452026-04-11 — best price $18.992026-07-17 — best price $6.452026-08-30 — best price $18.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

151442026-05-31 — 73 pageviews2026-06-03 — 65 pageviews2026-06-06 — 84 pageviews2026-06-09 — 46 pageviews2026-06-12 — 72 pageviews2026-06-15 — 74 pageviews2026-06-18 — 65 pageviews2026-06-21 — 66 pageviews2026-06-24 — 110 pageviews2026-06-27 — 103 pageviews2026-06-30 — 67 pageviews2026-07-03 — 69 pageviews2026-07-06 — 83 pageviews2026-07-09 — 70 pageviews2026-07-12 — 83 pageviews2026-07-15 — 54 pageviews2026-07-18 — 63 pageviews2026-07-21 — 109 pageviews2026-07-24 — 60 pageviews2026-07-27 — 72 pageviews2026-07-30 — 92 pageviews2026-08-02 — 84 pageviews2026-08-05 — 67 pageviews2026-08-08 — 61 pageviews2026-08-11 — 96 pageviews2026-08-14 — 101 pageviews2026-08-17 — 130 pageviews2026-08-20 — 100 pageviews2026-08-23 — 104 pageviews2026-08-26 — 98 pageviews2026-08-28 — 83 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

54
achievements tracked
50.5%
earned "Sink Beneath the Waves"
5.5%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxSingle-playerSteam AchievementsSteam Trading CardsSteam CloudFamily Sharing1 DLC

1 supported languages: English

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)16,2151%54

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

Player tags

RPGDarkIndieHorrorSurvivalAdventureSteampunkOpen WorldRogue-likeStory Rich

Census log

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

Players also track

Legends of EisenwaldRimWorldSavage LandsVaganteHearthlandsJudgment: Apocalypse Survival SimulationForce of NatureGreedFall

Similarity via IGDB.

Official site ↗Reddit ↗Wikipedia ↗