Games like On My Own
Games like On My Own include Terraria, Starbound, Don't Starve, Don't Starve Together, and The Forest. We matched them by the tags players give On My Own on Steam (Survival, Nature, Relaxing, Simulation, and Open World Survival Craft): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Survival · Open World Survival Craft · Adventure

Starbound
Shared: Survival · Open World Survival Craft · Adventure

Don't Starve
Shared: Survival · Open World Survival Craft · Adventure

Don't Starve Together
Shared: Survival · Open World Survival Craft · Adventure

The Forest
Shared: Survival · Open World Survival Craft · Adventure

The Long Dark
Shared: Survival · Open World Survival Craft · Adventure

theHunter: Call of the Wild™
Shared: Nature · Relaxing · Survival

Forager
Shared: Survival · Open World Survival Craft · Crafting

Rust
Shared: Survival · Crafting · Open World Survival Craft

Ancestors: The Humankind Odyssey
Shared: Survival · Open World Survival Craft · Nature

DAVE THE DIVER
Shared: Relaxing · Adventure · Pixel Graphics

Raft
Shared: Survival · Open World Survival Craft · Crafting

Subnautica
Shared: Survival · Open World Survival Craft · Crafting

Valheim
Shared: Survival · Open World Survival Craft · Crafting

Stranded Deep
Shared: Survival · Open World Survival Craft · Crafting

ARK: Survival Evolved
Shared: Survival · Open World Survival Craft · Crafting

Green Hell
Shared: Survival · Open World Survival Craft · Crafting

No Man's Sky
Shared: Survival · Open World Survival Craft · Adventure

The Escapists
Shared: Simulation · Crafting · Pixel Graphics

Palworld
Shared: Survival · Open World Survival Craft · Crafting

Conan Exiles Enhanced
Shared: Survival · Open World Survival Craft · Crafting

Stardew Valley
Shared: Relaxing · Simulation · Pixel Graphics

Core Keeper
Shared: Survival · Pixel Graphics · Crafting

The Survivalists
Shared: Survival · Crafting · Adventure