Games like Terracosmic
Games like Terracosmic include PUBG: BATTLEGROUNDS, Once Human, Far Cry 3, The Forest, and Rust. We matched them by the tags players give Terracosmic on Steam (Strategy, Action, Adventure, Simulation, and Survival): closest matches first, and among equally close ones the better-known games.

PUBG: BATTLEGROUNDS
Shared: Survival · Action · FPS

Once Human
Shared: Action · Open World · Survival

Far Cry 3
Shared: Action · Adventure · Open World

The Forest
Shared: Survival · Adventure · Open World

Rust
Shared: Survival · Open World · Adventure

7 Days to Die
Shared: Survival · Open World · Voxel

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

The Isle
Shared: Survival · Simulation · Open World

Mount & Blade II: Bannerlord
Shared: Strategy · Open World · Action

Far Cry® 4
Shared: Action · Open World · Adventure

SPORE™ Galactic Adventures
Shared: Action · Simulation · Adventure

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

Conan Exiles Enhanced
Shared: Survival · Open World · Adventure

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Open World · Survival · FPS

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

Feed and Grow: Fish
Shared: Simulation · Survival · Action

Atomic Heart
Shared: Adventure · Action · Open World

Arma 3
Shared: Action · Simulation · Open World

Mount & Blade: Warband
Shared: Strategy · Open World · Action

RimWorld
Shared: Strategy · Survival · Simulation

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

DayZ
Shared: Survival · Open World · Action

Space Rangers HD: A War Apart
Shared: Strategy · Adventure · Simulation

Rise of the Tomb Raider™
Shared: Action · Adventure · Open World