Games like Discovery 2
Games like Discovery 2 include Slime Rancher, A Game About Digging A Hole, The Long Dark, Elite Dangerous, and PEAK. We matched them by the tags players give Discovery 2 on Steam (Adventure, Simulation, Sandbox, Exploration, and 3D): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · First-Person

A Game About Digging A Hole
Shared: Exploration · Sandbox · Simulation

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

Elite Dangerous
Shared: Exploration · Simulation · Adventure

PEAK
Shared: Adventure · Exploration · First-Person

SnowRunner
Shared: Simulation · Adventure · Exploration

No Man's Sky
Shared: Exploration · Adventure · Sandbox

Thief Simulator
Shared: Simulation · Adventure · First-Person

Internet Cafe Simulator 2
Shared: Simulation · Exploration · 3D

Terraria
Shared: Sandbox · Adventure · Exploration

The Forest
Shared: Adventure · First-Person · Exploration

Black Desert
Shared: Sandbox · Exploration · First-Person

Forza Horizon 5
Shared: Simulation · Adventure · Exploration

Teardown
Shared: Sandbox · Voxel · First-Person

Wobbly Life
Shared: Adventure · Sandbox · Simulation

BeamNG.drive
Shared: Simulation · Sandbox · First-Person

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Adventure

Mount & Blade II: Bannerlord
Shared: Sandbox · Medieval · Simulation

Empyrion - Galactic Survival
Shared: Simulation · Exploration · Sandbox

Goat Simulator 3
Shared: Sandbox · Exploration · Simulation

X-Plane 11
Shared: Simulation · Sandbox · VR

Firewatch
Shared: Adventure · First-Person · Exploration

Stranded Deep
Shared: Adventure · First-Person · Exploration

Blade and Sorcery
Shared: Sandbox · VR · Magic