Games like Santa's War on Christmas
Games like Santa's War on Christmas include Hotline Miami, Hotline Miami 2: Wrong Number, My Friend Pedro, 12 is Better Than 6, and RUINER. We matched them by the tags players give Santa's War on Christmas on Steam (Action, Shooter, Top-Down Shooter, Top-Down, and Indie): closest matches first, and among equally close ones the better-known games.

Hotline Miami
Shared: Action · Indie · Top-Down

Hotline Miami 2: Wrong Number
Shared: Action · Gore · Top-Down

My Friend Pedro
Shared: Action · Shooter · Indie

12 is Better Than 6
Shared: Action · Shooter · Top-Down Shooter

RUINER
Shared: Action · Top-Down Shooter · Indie

KovaaK's
Shared: Action · Shooter · Indie

The Hong Kong Massacre
Shared: Action · Top-Down Shooter · Shooter

Bright Memory: Infinite
Shared: Action · Shooter · Indie

DOOM Eternal
Shared: Action · Shooter · Gore

Alien Shooter
Shared: Shooter · Action · Top-Down

Trepang2
Shared: Shooter · Action · Singleplayer

Ape Out
Shared: Action · Top-Down · Indie

Call of Duty®
Shared: Shooter · Action · Singleplayer

The Ascent
Shared: Top-Down Shooter · Action · Shooter

DOOM
Shared: Action · Shooter · Gore

BioShock Infinite
Shared: Action · Shooter · Singleplayer

Halo: Spartan Assault
Shared: Action · Top-Down Shooter · Shooter

Escape From Duckov
Shared: Action · Top-Down Shooter · Shooter

Serious Sam 4
Shared: Action · Shooter · Gore

Wolfenstein II: The New Colossus
Shared: Action · Shooter · Singleplayer

Ready or Not
Shared: Shooter · Action · Singleplayer

171
Shared: Action · Indie · Shooter

Redeemer: Enhanced Edition
Shared: Action · Top-Down · Indie

Crimsonland
Shared: Action · Shooter · Top-Down