Games like Undefined Survivors -アンディファインド サバイバーズ-
Games like Undefined Survivors -アンディファインド サバイバーズ- include The Forest, Subnautica, Sons Of The Forest, Valheim, and Rust. We matched them by the tags players give Undefined Survivors -アンディファインド サバイバーズ- on Steam (Underwater, Exploration, Survival, Action-Adventure, and Open World): closest matches first, and among equally close ones the better-known games.

The Forest
Shared: Survival · Open World · Crafting

Subnautica
Shared: Survival · Underwater · Exploration

Sons Of The Forest
Shared: Survival · Open World · Crafting

Valheim
Shared: Survival · Open World · Exploration

Rust
Shared: Survival · Crafting · Open World

Subnautica 2
Shared: Survival · Underwater · Exploration

Raft
Shared: Survival · Open World · Crafting

Once Human
Shared: Open World · Survival · Exploration

Far Cry® 5
Shared: Action-Adventure · Open World · Exploration

Terraria
Shared: Survival · Exploration · Crafting

Stranded Deep
Shared: Survival · Open World · Exploration

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

Core Keeper
Shared: Exploration · Survival · Open World

Enshrouded
Shared: Survival · Open World · Exploration

Subnautica: Below Zero
Shared: Underwater · Survival · Exploration

Far Cry® Primal
Shared: Survival · Open World · Exploration

Sunkenland
Shared: Underwater · Survival · Exploration

V Rising
Shared: Survival · Open World · Crafting

Conan Exiles Enhanced
Shared: Survival · Open World · Crafting

RuneScape: Dragonwilds
Shared: Survival · Open World · Crafting

ICARUS
Shared: Survival · Exploration · Crafting

Palworld
Shared: Survival · Open World · Crafting

Satisfactory
Shared: Open World · Crafting · Exploration

ARK: Survival Ascended
Shared: Survival · Open World · Crafting