Games like Lost Sea
Games like Lost Sea include Skul: The Hero Slayer, Hades, The Binding of Isaac, Don't Starve, and Angvik. We matched them by the tags players give Lost Sea on Steam (Adventure, Action, Indie, Perma Death, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Skul: The Hero Slayer
Shared: Action · Indie · Action Roguelike

Hades
Shared: Indie · Action Roguelike · Action

The Binding of Isaac
Shared: Indie · Action Roguelike · Action

Don't Starve
Shared: Adventure · Indie · Singleplayer

Angvik
Shared: Indie · Action · Adventure

Tomb Raider Game of the Year
Shared: Adventure · Action · Singleplayer

Rise of the Tomb Raider™
Shared: Adventure · Action · Singleplayer

God of War
Shared: Action · Adventure · Singleplayer

ScourgeBringer
Shared: Action · Adventure · Indie

Risk of Rain (2013)
Shared: Indie · Action · Action Roguelike

Dead Cells
Shared: Adventure · Action Roguelike · Action

UnderMine
Shared: Action Roguelike · Indie · Action

Deliver Us The Moon
Shared: Adventure · Action · Indie

ICEY
Shared: Action · Adventure · Indie

Vampire Survivors
Shared: Action Roguelike · Indie · Singleplayer

SANABI
Shared: Action · Adventure · Singleplayer

Bastion
Shared: Action · Indie · Singleplayer

Rogue Legacy
Shared: Indie · Action · Action Roguelike

Dust: An Elysian Tail
Shared: Action · Indie · Adventure

STAR WARS Jedi: Survivor™
Shared: Action · Adventure · Singleplayer

Bendy and the Dark Revival
Shared: Action · Singleplayer · Adventure

Crimson Desert Enhanced
Shared: Action · Adventure · Singleplayer

Megabonk
Shared: Indie · Action Roguelike · Action

BELOW
Shared: Action · Adventure · Singleplayer