Games like Iron Wasteland
Games like Iron Wasteland include Far Cry 3, Fallout 4, Rust, PUBG: BATTLEGROUNDS, and Metro Exodus. We matched them by the tags players give Iron Wasteland on Steam (Action, Adventure, Sandbox, Shooter, and FPS): closest matches first, and among equally close ones the better-known games.

Far Cry 3
Shared: Action · Adventure · FPS

Fallout 4
Shared: Adventure · Shooter · Post-apocalyptic

Rust
Shared: Sandbox · Adventure · Survival

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS

Metro Exodus
Shared: FPS · Action · Post-apocalyptic

Grand Theft Auto V Legacy
Shared: Action · Adventure · Shooter

Far Cry® 4
Shared: Action · FPS · Adventure

Ravenfield
Shared: FPS · Shooter · Action

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Shooter · Post-apocalyptic

Far Cry® 2
Shared: Action · FPS · Shooter

Call of Duty®
Shared: Action · FPS · Shooter

DayZ
Shared: Shooter · Survival · Sandbox

BioShock Infinite
Shared: Action · Shooter · FPS

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

Borderlands 2
Shared: Action · Shooter · FPS

METRO Last Light Redux
Shared: Action · FPS · Post-apocalyptic

BONEWORKS
Shared: Action · Sandbox · Shooter

Aimlabs
Shared: Action · FPS · Shooter

Half-Life 2
Shared: Action · FPS · Shooter

Left 4 Dead 2
Shared: FPS · Action · Shooter

METRO 2033 Redux
Shared: FPS · Action · Post-apocalyptic

Freeman: Guerrilla Warfare
Shared: Action · Shooter · FPS

Arma 3
Shared: Action · Shooter · FPS

Ready or Not
Shared: Shooter · FPS · Action