Games like Diamond Island
Games like Diamond Island include Far Cry 3, PUBG: BATTLEGROUNDS, Far Cry® 4, S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition, and Far Cry® 6. We matched them by the tags players give Diamond Island on Steam (Survival, Action, Adventure, Shooter, and Open World): closest matches first, and among equally close ones the better-known games.

Far Cry 3
Shared: Action · Open World · Adventure

PUBG: BATTLEGROUNDS
Shared: Survival · Shooter · Action

Far Cry® 4
Shared: Action · Open World · Adventure

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

Far Cry® 6
Shared: Open World · Action · FPS

Far Cry® Primal
Shared: Survival · Action · Open World

Far Cry® 5
Shared: Open World · Shooter · FPS

Grand Theft Auto V Legacy
Shared: Action · Open World · Shooter

Rust
Shared: Survival · Open World · Adventure

Metro Exodus
Shared: FPS · Open World · Action

Fallout 4
Shared: Open World · Adventure · Shooter

Far Cry® 2
Shared: Action · Open World · Shooter

Atomic Heart
Shared: Adventure · Action · FPS

Far Cry® New Dawn
Shared: Action · Open World · FPS

Rise of the Tomb Raider™
Shared: Action · Adventure · Open World

BioShock Infinite
Shared: Action · Shooter · FPS

The Forest
Shared: Survival · Open World · Adventure

Halo Infinite
Shared: Action · Shooter · FPS

DayZ
Shared: Survival · Open World · Shooter

Left 4 Dead 2
Shared: Shooter · FPS · Action

Red Dead Redemption 2
Shared: Open World · Adventure · Action

Half-Life 2
Shared: Action · FPS · Shooter

Tom Clancy's Ghost Recon® Wildlands
Shared: Shooter · Open World · Action

Homefront®: The Revolution
Shared: Action · Shooter · Open World