Games like New Horizon
Games like New Horizon include Terraria, Rust, The Forest, Valheim, and ARK: Survival Evolved. We matched them by the tags players give New Horizon on Steam (Open World Survival Craft, Survival, Pixel Graphics, Building, and Adventure): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Open World Survival Craft · Survival · Pixel Graphics

Rust
Shared: Survival · Open World Survival Craft · Crafting

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

Valheim
Shared: Open World Survival Craft · Survival · Building

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

Starbound
Shared: Open World Survival Craft · Survival · Adventure

Necesse
Shared: Open World Survival Craft · Pixel Graphics · Survival

Forager
Shared: Open World Survival Craft · Survival · Pixel Graphics

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

Core Keeper
Shared: Survival · Pixel Graphics · Open World

Palworld
Shared: Survival · Open World Survival Craft · Open World

Raft
Shared: Survival · Open World Survival Craft · Crafting

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

Once Human
Shared: Survival · Open World Survival Craft · Open World

Dune: Awakening
Shared: Open World Survival Craft · Survival · Adventure

Project Zomboid
Shared: Survival · Open World Survival Craft · Open World

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

Subnautica
Shared: Open World Survival Craft · Survival · Crafting

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

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

Enshrouded
Shared: Survival · Open World · Crafting

ASTRONEER
Shared: Open World Survival Craft · Survival · Open World

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

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