The Game Census
SUNLESS SEA cover art

SUNLESS SEA

Failbetter Games · 2015-02-06

SteamGOGEpic Games Store

AdventureIndieRPG

Modes: Single player · Perspectives: Bird view / Isometric

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.

SUNLESS SEA is an Adventure, Indie and RPG game released in 2015, priced at $18.99, with an owner estimate of 1,000,000 .. 2,000,000 and a review sentiment of Very Positive (83% of 9563 reviews).— census verdict as of 2026-09-20

26
playing now
83%
positive of 9.6k reviews
Very Positive
steam's rating (official)
1,000,000–2,000,000
owners (SteamSpy est.)
85/100
critic score (4 outlets, IGDB)
76/100
IGDB user rating (80 ratings)
57
Nexus mods (72k downloads)
62h
to beat · rushed 22h · completionist 124h
gold
deck/linux tier (ProtonDB)
Playable
Steam Deck (Valve)
SteamOS: Playable
$18.99
steam price (US)

26 players in-game as of 2026-10-14 11:00 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.

Trailer

SUNLESS SEA trailer thumbnail

Sunless Sea - Launch Trailer

≈283,303 YouTube results for this game's trailer search

Health check

Quietly active
  • · 26 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 4% of 28,771 Adventure games in the census by review count.

Health tier since 2026-08-29

Estimated sales: 239k–574k copies

Review-multiple estimate from 9,563 total reviews — how this is computed.

Current store prices

GOG$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 24 of 87 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

93152026-09-15 12:00 — 44 players2026-09-16 20:00 — 69 players2026-09-18 04:00 — 44 players2026-09-19 11:00 — 35 players2026-09-20 19:00 — 78 players2026-09-22 02:00 — 41 players2026-09-23 10:00 — 39 players2026-09-24 17:00 — 39 players2026-09-26 01:00 — 40 players2026-09-27 08:00 — 37 players2026-09-28 16:00 — 48 players2026-09-29 23:00 — 40 players2026-10-01 07:00 — 15 players2026-10-02 14:00 — 50 players2026-10-03 22:00 — 59 players2026-10-05 06:00 — 35 players2026-10-06 14:00 — 51 players2026-10-07 21:00 — 49 players2026-10-09 05:00 — 30 players2026-10-10 12:00 — 42 players2026-10-11 20:00 — 93 players2026-10-13 03:00 — 44 players2026-10-14 11:00 — 26 players
Concurrent players, hourly average, last 30 days (census samples).
9320Jun 2014Aug 2026Jun 2014 — avg 0 · peak 4Oct 2014 — avg 64 · peak 293Feb 2015 — avg 932 · peak 3,869Jun 2015 — avg 343 · peak 1,742Oct 2015 — avg 105 · peak 251Feb 2016 — avg 476 · peak 1,944Jun 2016 — avg 156 · peak 543Oct 2016 — avg 608 · peak 2,216Feb 2017 — avg 530 · peak 2,728Jun 2017 — avg 180 · peak 619Oct 2017 — avg 129 · peak 460Feb 2018 — avg 130 · peak 263Jun 2018 — avg 116 · peak 258Oct 2018 — avg 94 · peak 272Feb 2019 — avg 229 · peak 576Jun 2019 — avg 78 · peak 205Oct 2019 — avg 83 · peak 173Feb 2020 — avg 67 · peak 131Jun 2020 — avg 78 · peak 158Oct 2020 — avg 89 · peak 220Feb 2021 — avg 84 · peak 180Jun 2021 — avg 64 · peak 117Oct 2021 — avg 56 · peak 147Feb 2022 — avg 71 · peak 158Jun 2022 — avg 71 · peak 144Oct 2022 — avg 61 · peak 128Feb 2023 — avg 54 · peak 96Jun 2023 — avg 70 · peak 137Oct 2023 — avg 48 · peak 112Feb 2024 — avg 63 · peak 131Jun 2024 — avg 46 · peak 122Oct 2024 — avg 43 · peak 78Feb 2025 — avg 67 · peak 156Jun 2025 — avg 42 · peak 75Oct 2025 — avg 41 · peak 77Feb 2026 — avg 36 · peak 68Jun 2026 — avg 39 · peak 72Aug 2026 — avg 56 · peak 116
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Price history

$18.99$5.692015-01-012026-10-142015-01-01 — best price $15.192015-06-05 — best price $11.392015-07-10 — best price $18.992015-12-04 — best price $9.492016-06-08 — best price $9.492016-12-15 — best price $6.452017-06-06 — best price $6.292017-11-16 — best price $6.262018-03-12 — best price $6.492018-09-04 — best price $6.492018-11-19 — best price $18.992019-04-22 — best price $6.452019-07-30 — best price $9.492019-11-26 — best price $6.452020-03-16 — best price $6.492020-11-02 — best price $18.992021-06-09 — best price $6.452021-11-23 — best price $9.492022-01-05 — best price $18.992022-06-06 — best price $6.452022-11-29 — best price $18.992023-05-11 — best price $18.992024-01-04 — best price $18.992024-06-19 — best price $6.452025-01-24 — best price $6.452025-06-18 — best price $6.452025-11-05 — best price $18.992026-03-27 — best price $6.492026-07-17 — best price $6.452026-09-06 — best price $18.992026-09-21 — best price $18.992026-10-06 — best price $18.992026-10-14 — best price $18.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

162532026-05-31 — 73 pageviews2026-06-04 — 58 pageviews2026-06-08 — 64 pageviews2026-06-12 — 72 pageviews2026-06-16 — 69 pageviews2026-06-20 — 53 pageviews2026-06-24 — 110 pageviews2026-06-28 — 102 pageviews2026-07-02 — 77 pageviews2026-07-06 — 83 pageviews2026-07-10 — 55 pageviews2026-07-14 — 70 pageviews2026-07-18 — 63 pageviews2026-07-22 — 68 pageviews2026-07-26 — 57 pageviews2026-07-30 — 92 pageviews2026-08-03 — 62 pageviews2026-08-07 — 72 pageviews2026-08-11 — 96 pageviews2026-08-15 — 98 pageviews2026-08-19 — 104 pageviews2026-08-23 — 104 pageviews2026-08-27 — 114 pageviews2026-08-31 — 90 pageviews2026-09-04 — 162 pageviews2026-09-08 — 74 pageviews2026-09-12 — 72 pageviews2026-09-16 — 100 pageviews2026-09-20 — 91 pageviews2026-09-24 — 83 pageviews2026-09-28 — 91 pageviews2026-10-02 — 59 pageviews2026-10-06 — 115 pageviews2026-10-10 — 78 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

Post-launch support: 1 DLC released, first 2016-10-11 (Steam store data)

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.

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

RPGDarkIndieHorrorSurvivalAdventureSteampunkOpen WorldRogue-likeStory Rich

Census log

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

Recent updates

Players also track

Legends of EisenwaldRimWorldSavage LandsVaganteHearthlandsJudgment: Apocalypse Survival SimulationForce of NatureGreedFall

Similarity via IGDB.

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