Games like Viking Breaker
Games like Viking Breaker include Vampire Survivors, Crab Champions, Megabonk, Halls of Torment, and Magicraft. We matched them by the tags players give Viking Breaker on Steam (Bullet Hell, Action Roguelike, Looter Shooter, Roguelite, and PvE): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · Roguelite

Crab Champions
Shared: Action Roguelike · Looter Shooter · Bullet Hell

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Roguelite

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelite

Rogue: Genesia
Shared: Bullet Hell · Action Roguelike · Roguelite

Death Must Die
Shared: Bullet Hell · Action Roguelike · Roguelite

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Looter Shooter

BALL x PIT
Shared: Bullet Hell · Roguelite · Action Roguelike

Nova Drift
Shared: Bullet Hell · Roguelite · Action Roguelike

Pass the Fear
Shared: Action Roguelike · Bullet Hell · Roguelite

Gunfire Reborn
Shared: Roguelite · Looter Shooter · Roguelike

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

Roboquest
Shared: Action Roguelike · Roguelite · Shooter

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Roguelite

Enter the Gungeon
Shared: Bullet Hell · Action Roguelike · Roguelike

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Hell · Roguelite

Deadzone: Rogue
Shared: Roguelite · PvE · Looter Shooter

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

Hades
Shared: Action Roguelike · Roguelite · Roguelike

Boneraiser Minions
Shared: Bullet Hell · Action Roguelike · Roguelite

Slime 3K: Rise Against Despot
Shared: Bullet Hell · Action Roguelike · Roguelite

Astro Prospector
Shared: Action Roguelike · Bullet Hell · Roguelite