Games like Dead Christmas
Games like Dead Christmas include PUBG: BATTLEGROUNDS, BioShock Infinite, Fallout 4, Warframe, and Grand Theft Auto V Legacy. We matched them by the tags players give Dead Christmas on Steam (Action, Adventure, RPG, Action RPG, and Shooter): closest matches first, and among equally close ones the better-known games.

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS

BioShock Infinite
Shared: Action · Shooter · FPS

Fallout 4
Shared: RPG · Adventure · Shooter

Warframe
Shared: Action · Action RPG · RPG

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

Borderlands 2
Shared: Action · Shooter · RPG

Black Myth: Wukong
Shared: Action · Action RPG · RPG

Counter-Strike 2
Shared: Action · Shooter · FPS

Aimlabs
Shared: Action · FPS · Shooter

Half-Life 2
Shared: Action · FPS · Adventure

Atomic Heart
Shared: Adventure · Action · FPS

REMNANT II®
Shared: Action · Adventure · RPG

Left 4 Dead 2
Shared: Action · FPS · Shooter

Far Cry 3
Shared: Action · Adventure · FPS

Black Mesa
Shared: Action · FPS · Shooter

Gothic 1 Remake
Shared: Adventure · RPG · Action

ORION: Prelude
Shared: Action · FPS · Adventure

Apex Legends™
Shared: Action · Shooter · FPS

Fallout: New Vegas
Shared: RPG · Action · Adventure

The Killing Antidote
Shared: Action · Adventure · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Third-Person Shooter

S.T.A.L.K.E.R.: Shadow of Chornobyl - Enhanced Edition
Shared: Action · Adventure · RPG

OUTRIDERS
Shared: RPG · Action · Adventure

Dragon's Dogma 2
Shared: RPG · Action RPG · Action