Games like Mythic Ocean: Prologue
Games like Mythic Ocean: Prologue include Martial Law, ABZU, Journey, Firewatch, and Stray. We matched them by the tags players give Mythic Ocean: Prologue on Steam (Free to Play, Adventure, Indie, Visual Novel, and Underwater): closest matches first, and among equally close ones the better-known games.

Martial Law
Shared: Free to Play · Adventure · Choices Matter

ABZU
Shared: Underwater · Adventure · Exploration

Journey
Shared: Adventure · Indie · Atmospheric

Firewatch
Shared: Adventure · Atmospheric · Indie

Stray
Shared: Adventure · Atmospheric · Exploration

Samsara Room
Shared: Indie · Adventure · Free to Play

Outcore: Desktop Adventure
Shared: Adventure · Free to Play · Exploration

FAR: Lone Sails
Shared: Adventure · Atmospheric · Indie

OneShot
Shared: Indie · Adventure · Atmospheric

The Forgotten City
Shared: Adventure · Exploration · Indie

Outer Wilds
Shared: Adventure · Exploration · Atmospheric

In Other Waters
Shared: Adventure · Indie · Exploration

Where Winds Meet
Shared: Free to Play · Adventure · Indie

Palia
Shared: Free to Play · Exploration · Adventure

What Remains of Edith Finch
Shared: Adventure · Atmospheric · Exploration

Cairn
Shared: Indie · Adventure · Exploration

Subnautica
Shared: Underwater · Exploration · Adventure

Night in the Woods
Shared: Adventure · Atmospheric · Exploration

Raging Loop
Shared: Adventure · Visual Novel · Indie

Under The Waves
Shared: Adventure · Underwater · Exploration

Rain World
Shared: Indie · Exploration · Atmospheric

The Mr. Rabbit Magic Show
Shared: Adventure · Free to Play · Indie

The Crown of Leaves
Shared: Adventure · Visual Novel · Indie

PEAK
Shared: Adventure · Exploration · Indie