Games like Iron Decree
Games like Iron Decree include Left 4 Dead 2, Gunfire Reborn, Witchfire, PUBG: BATTLEGROUNDS, and Hades. We matched them by the tags players give Iron Decree on Steam (Roguelite, RPG, Magic, Shooter, and Survival): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Shooter · FPS · Zombies

Gunfire Reborn
Shared: Roguelite · FPS · RPG

Witchfire
Shared: Roguelite · RPG · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · Survival · FPS

Hades
Shared: Roguelite · Action Roguelike · Hack and Slash

Back 4 Blood
Shared: Shooter · FPS · Zombies

Roboquest
Shared: Roguelite · Shooter · Action Roguelike

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

Risk of Rain 2
Shared: Roguelite · Action Roguelike · Shooter

Left 4 Dead
Shared: Shooter · FPS · Zombies

Hades II
Shared: Roguelite · RPG · Action Roguelike

DayZ
Shared: Survival · Shooter · Zombies

Killing Floor 2
Shared: FPS · Shooter · Zombies

Remnant: From the Ashes
Shared: RPG · Shooter · Co-op

Killing Floor
Shared: FPS · Survival · Zombies

Warhammer: Vermintide 2
Shared: Dark Fantasy · Hack and Slash · Co-op

Borderlands 3
Shared: RPG · FPS · Shooter

Deep Rock Galactic: Rogue Core
Shared: Roguelite · FPS · Shooter

Counter-Strike 2
Shared: Shooter · FPS · Action

Halls of Torment
Shared: Roguelite · Action Roguelike · RPG

Ziggurat
Shared: Roguelite · Shooter · Action Roguelike

PAYDAY 2
Shared: FPS · Co-op · Shooter

Borderlands 2
Shared: Shooter · RPG · FPS

Fallout 4
Shared: RPG · Shooter · Singleplayer