Games like Z.I.O.N.
Games like Z.I.O.N. include Far Cry 3, Half-Life 2, Atomic Heart, BioShock Infinite, and Far Cry® 4. We matched them by the tags players give Z.I.O.N. on Steam (Action, Adventure, and FPS): closest matches first, and among equally close ones the better-known games.

Far Cry 3
Shared: Action · FPS · Adventure

Half-Life 2
Shared: Action · FPS · Adventure

Atomic Heart
Shared: Adventure · Action · FPS

BioShock Infinite
Shared: Action · FPS · Adventure

Far Cry® 4
Shared: Action · FPS · Adventure

PUBG: BATTLEGROUNDS
Shared: FPS · Action · Adventure

Black Mesa
Shared: Action · FPS · Adventure

Far Cry® New Dawn
Shared: Action · FPS · Adventure

Apex Legends™
Shared: FPS · Action · Adventure

Aimlabs
Shared: FPS · Action · Adventure

Half-Life: Opposing Force
Shared: Action · FPS · Adventure

RoboCop: Rogue City
Shared: Action · FPS · Adventure

Far Cry® 6
Shared: FPS · Action · Adventure

Call of Duty®: Black Ops III
Shared: FPS · Action · Adventure

DOOM Eternal
Shared: Action · FPS · Adventure

Necromunda: Hired Gun
Shared: Action · Adventure · FPS

ORION: Prelude
Shared: Action · FPS · Adventure

Half-Life: Blue Shift
Shared: Action · FPS · Adventure

METRO Last Light Redux
Shared: FPS · Action · Adventure

Far Cry® 2
Shared: Action · FPS · Adventure

Metro Exodus
Shared: FPS · Action · Adventure

Left 4 Dead 2
Shared: FPS · Action · Adventure

Bulletstorm: Full Clip Edition
Shared: Action · FPS · Adventure

Shadow Warrior
Shared: Action · FPS · Adventure