Games like The Crimson Contract
Games like The Crimson Contract include Yet Another Zombie Survivors, Rogue: Genesia, Risk of Rain 2, PAYDAY 2, and Gunfire Reborn. We matched them by the tags players give The Crimson Contract on Steam (Bullet Heaven, PvE, Looter Shooter, Zombies, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Yet Another Zombie Survivors
Shared: Bullet Heaven · Zombies · Top-Down Shooter

Rogue: Genesia
Shared: Bullet Heaven · PvE · Roguelite

Risk of Rain 2
Shared: Co-op · Looter Shooter · Roguelite

PAYDAY 2
Shared: Co-op · Looter Shooter · Action

Gunfire Reborn
Shared: Co-op · Roguelite · Looter Shooter

R.I.P. - Reincarnation Insurance Program
Shared: Bullet Heaven · Looter Shooter · Zombies

Deep Rock Galactic: Survivor
Shared: Bullet Heaven · PvE · Top-Down Shooter

The Spell Brigade
Shared: Bullet Heaven · Co-op · Roguelite

Left 4 Dead 2
Shared: Co-op · Zombies · Action

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Roguelite · Co-op

Zombieville USA 3D
Shared: Top-Down Shooter · Co-op · Action

Deadzone: Rogue
Shared: PvE · Looter Shooter · Roguelite

Relic Hunters Zero: Remix
Shared: Looter Shooter · Twin Stick Shooter · Top-Down Shooter

Megabonk
Shared: Bullet Heaven · Roguelite · Action

BALL x PIT
Shared: Roguelite · Action · Arcade

Crab Champions
Shared: Looter Shooter · Co-op · Arcade

Destiny 2
Shared: Looter Shooter · Co-op · PvE

Deep Rock Galactic
Shared: PvE · Co-op · Shooter

HELLDIVERS™ 2
Shared: PvE · Co-op · Action

SYNTHETIK 2
Shared: Top-Down Shooter · Roguelite · Twin Stick Shooter

Abyssus
Shared: Co-op · PvE · Looter Shooter

Jump Space
Shared: PvE · Co-op · Roguelite

Warframe
Shared: Looter Shooter · Action · Co-op

Killing Floor 3
Shared: PvE · Co-op · Zombies