Games like DEATHMARK
Games like DEATHMARK include Town of Salem, Among Us, LOCKDOWN Protocol, Slay the Spire 2, and Phasmophobia. We matched them by the tags players give DEATHMARK on Steam (Social Deduction, Card Game, Class-Based, Magic, and Mystery): closest matches first, and among equally close ones the better-known games.

Town of Salem
Shared: Social Deduction · Multiplayer · Mystery

Among Us
Shared: Social Deduction · Multiplayer · Funny

LOCKDOWN Protocol
Shared: Social Deduction · Multiplayer · First-Person

Slay the Spire 2
Shared: Card Game · Multiplayer · Card Battler

Phasmophobia
Shared: Multiplayer · First-Person · Mystery

Feign
Shared: Social Deduction · Multiplayer · Mystery

PEAK
Shared: Multiplayer · 3D · First-Person

Dale & Dawson Stationery Supplies
Shared: Social Deduction · Multiplayer · 3D

UNO
Shared: Card Game · Multiplayer · Funny

Friends vs Friends
Shared: Card Game · Multiplayer · Colorful

Magic: The Gathering Arena
Shared: Card Game · Multiplayer · Magic

Inscryption
Shared: Card Game · Card Battler · Strategy

MECCHA CHAMELEON
Shared: Multiplayer · Funny · Colorful

Witch It
Shared: Multiplayer · Funny · Indie

Perfect Heist 2
Shared: Multiplayer · Social Deduction · Class-Based

First Class Trouble
Shared: Social Deduction · Multiplayer · Funny

DICEOMANCER
Shared: Card Game · Card Battler · Colorful

Secret Neighbor: Hello Neighbor Multiplayer
Shared: Multiplayer · Mystery · First-Person

Project Winter
Shared: Social Deduction · Multiplayer · Colorful

Slay the Spire
Shared: Card Game · Card Battler · Strategy

Oh Deer
Shared: Social Deduction · Multiplayer · Funny

Tabletop Simulator
Shared: Card Game · Multiplayer · 3D

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Game · Card Battler · Strategy

Scam Line
Shared: Multiplayer · Social Deduction · Indie