Games like Surmountable
Games like Surmountable include The Forest, Rust, The Long Dark, Subnautica, and ARK: Survival Evolved. We matched them by the tags players give Surmountable on Steam (Adventure, 3D, First-Person, Survival, and Artificial Intelligence): closest matches first, and among equally close ones the better-known games.

The Forest
Shared: Survival · Adventure · Crafting

Rust
Shared: Survival · Crafting · Adventure

The Long Dark
Shared: Survival · Adventure · First-Person

Subnautica
Shared: Survival · Adventure · Crafting

ARK: Survival Evolved
Shared: Survival · Adventure · Crafting

Raft
Shared: Survival · Crafting · Adventure

Far Cry® Primal
Shared: Survival · Adventure · First-Person

Stranded Deep
Shared: Survival · Adventure · First-Person

Don't Starve
Shared: Adventure · Survival · Crafting

Sons Of The Forest
Shared: Survival · First-Person · Crafting

Rise of the Tomb Raider™
Shared: Adventure · Female Protagonist · Singleplayer

Five Nights at Freddy's: Security Breach
Shared: First-Person · 3D · Singleplayer

Scrap Mechanic
Shared: Survival · Adventure · Crafting

Subnautica: Below Zero
Shared: Survival · Adventure · Singleplayer

Green Hell
Shared: Survival · Crafting · Adventure

Terraria
Shared: Survival · Adventure · Crafting

ARK: Survival Ascended
Shared: Survival · Adventure · Crafting

Grounded
Shared: Survival · Adventure · Crafting

We Happy Few
Shared: Adventure · Survival · First-Person

Don't Starve Together
Shared: Survival · Adventure · Crafting

The Last Caretaker
Shared: Survival · Crafting · First-Person

Portal 2
Shared: First-Person · Singleplayer · Female Protagonist

No Man's Sky
Shared: Survival · Adventure · First-Person

Pacific Drive
Shared: Survival · Adventure · Crafting