SUNLESS SEA

Gothic horror RPG about surviving voyages across an underground sea

Failbetter Games · Released Feb 6, 2015

Reviews: Very Positive; 83% of 9,565
Recent reviews: Mostly Positive; 79% of 24 in 30 days
Playing now: 38; right now
Steam Deck: Playable
Last update: 3 weeks ago; Aug 27, 2026

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

83% of 9,565 reviews are positive · 79% of 24 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.

Screenshots and trailer

SUNLESS SEA system requirements

As published by the developer.

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