PCGame

SUNLESS SEA

Gothic horror RPG about surviving voyages across an underground sea

Failbetter Games · Released Feb 6, 2015

AdventureIndieRPG

Reviews
Very Positive
84% of 7,916
Recent reviews
Mostly Positive
78% of 23 in 30 days
Players
48
daily peak, Nov 7, 2026
Steam Deck
Playable
Last update on Steam
2 months ago
Aug 27, 2026
Minimum PC
DirectX 9 GPU
1 GB RAM · 0.7 GB disk
Full requirements

Metacritic: 81/100 (critic reviews)

What is SUNLESS SEA?

In this gothic horror RPG, you captain a Victorian steamship across an underground sea, visiting ports, trading goods, hiring officers, and fighting ships and sea creatures in real time. You pursue personal quests and choices about London's future. When a captain dies, some resources can pass to a successor.

For you if...

  • +you like reading unsettling stories in a gothic setting
  • +you enjoy exploring unfamiliar ports while managing supplies
  • +you welcome the risk of losing a captain

Not for you if...

  • −you want brisk sailing and steady story progress
  • −you want straightforward systems from the first voyage
  • −you prefer action to long stretches of reading

What players say

84% of 7,916 reviews are positive · 78% of 23 in the last 30 days

Players praise the writing, strange world, and stories found at each port. Common complaints are slow travel, repetitive routes after a captain dies, and the difficulty of learning how to survive.

Players over time

▼ -4% vs a month ago

Players online on Steam, one sample a day.

Highest since Sep 2026: 65 players on Oct 12, 2026.

Show the data
DayPlayers
Nov 7, 202648
Nov 6, 202653
Nov 5, 20260
Nov 4, 202646
Nov 3, 202657
Nov 2, 202658
Nov 1, 202646
Oct 31, 202646
Oct 30, 202650
Oct 29, 202650
Oct 28, 202656
Oct 27, 202648
Oct 26, 202643
Oct 25, 202649
Oct 24, 202646
Oct 23, 202649
Oct 22, 202648
Oct 21, 202641
Oct 20, 202634
Oct 19, 202638
Oct 18, 202630
Oct 17, 202645
Oct 16, 202630
Oct 15, 202640
Oct 14, 202651
Oct 13, 202650
Oct 12, 202665
Oct 11, 202646
Oct 10, 202636
Oct 9, 202636
Oct 8, 202637
Oct 7, 202653
Oct 6, 202652
Oct 5, 202652
Oct 4, 202656
Oct 3, 202654
Oct 2, 202642
Oct 1, 202634
Sep 30, 202642
Sep 29, 202642
Sep 28, 202640
Sep 27, 202642
Sep 26, 202637
Sep 25, 202637
Sep 24, 202646
Sep 23, 202638
Sep 23, 202641
Sep 22, 202633
Sep 21, 202647

How many players finish SUNLESS SEA?

0.8% of Steam players have unlocked «Romans 6:9», the achievement for finishing the main story.

Share of everyone who owns the game on Steam, including those who barely played it. Updated weekly.

Screenshots and trailer

SUNLESS SEA screenshot 1

SUNLESS SEA system requirements

Minimum: DirectX 9 GPU, 1 GB RAM, 0.7 GB of disk space.

As published by the developer.

Can my PC run SUNLESS SEA?

Tell us your graphics card once and every game page will answer this for you.

Set up my PC →

Minimum

OS
Windows 10 or later
Processor
2Ghz or better
Graphics
1280x768 minimum resolution, DirectX 9.0c compatible graphics card
Memory
1 GB RAM
Storage
700 MB available space
DirectX
Version 9.0c

Does SUNLESS SEA have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Does SUNLESS SEA run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Default controller config not fully functional
  • Sometimes shows mouse, keyboard or non-Deck controller icons
  • Some text entry requires manually opening the on-screen keyboard
  • Some in-game text is small and may be hard to read
  • Default graphics settings perform well on Steam Deck

PC version details

DRM
None declared on Steam
Controller
Keyboard and mouse
Platforms
Windows, macOS, Linux
Achievements
54
Steam features
Cloud saves, Family Sharing, Trading cards
Languages
Text only: English.

Does SUNLESS SEA use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Nov 7, 2026. How to filter AI games on Steam

Tags

Recent updates

1 DLC available.

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