Games like Aground Zero
Games like Aground Zero include Fallout 4, Fallout: New Vegas, 7 Days to Die, Fallout 3, and Black Desert. We matched them by the tags players give Aground Zero on Steam (Colony Sim, Exploration, Sandbox, Character Customization, and RPG): closest matches first, and among equally close ones the better-known games.
Fallout 4
Shared: Exploration · RPG · Post-apocalyptic
Fallout: New Vegas
Shared: RPG · Exploration · Post-apocalyptic
7 Days to Die
Shared: Exploration · Post-apocalyptic · Sandbox
Fallout 3
Shared: Exploration · RPG · Post-apocalyptic
Black Desert
Shared: Sandbox · Exploration · First-Person
Starfield
Shared: Exploration · RPG · Character Customization
Timberborn
Shared: Colony Sim · Sandbox · Voxel
Kenshi
Shared: Sandbox · RPG · Post-apocalyptic
RimWorld
Shared: Colony Sim · Sandbox · Base Building
Tainted Grail: The Fall of Avalon
Shared: RPG · Exploration · Character Customization
SPORE™
Shared: Colony Sim · Sandbox · Exploration
The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009)
Shared: RPG · Exploration · First-Person
Mortal Online 2
Shared: Sandbox · Character Customization · Exploration
Oxygen Not Included
Shared: Colony Sim · Sandbox · Base Building
The Elder Scrolls IV: Oblivion Remastered
Shared: RPG · Exploration · Character Customization
Enshrouded
Shared: Exploration · RPG · Base Building
Satisfactory
Shared: Sandbox · Exploration · Base Building
Dune: Awakening
Shared: Exploration · Sandbox · Base Building
Slime Rancher
Shared: Exploration · Sandbox · First-Person
The Long Dark
Shared: Exploration · Sandbox · First-Person
No Man's Sky
Shared: Exploration · Sandbox · Open World
A Game About Digging A Hole
Shared: Exploration · Sandbox · Voxel
The Last Caretaker
Shared: Sandbox · Exploration · First-Person
Terraria
Shared: Sandbox · Exploration · Adventure