Games like Birger's Saga
Games like Birger's Saga include Megabonk, Hades, ALTF4, Vampire Survivors, and Have a Nice Death. We matched them by the tags players give Birger's Saga on Steam (Action Roguelike, Hack and Slash, Runner, Arcade, and 3D): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Arcade · Action

Hades
Shared: Action Roguelike · Hack and Slash · Action

ALTF4
Shared: Runner · Third Person · Arcade

Vampire Survivors
Shared: Action Roguelike · Arcade · Pixel Graphics

Have a Nice Death
Shared: Action Roguelike · Hack and Slash · Funny

Skul: The Hero Slayer
Shared: Action Roguelike · Action · Indie

Shape of Dreams
Shared: Action Roguelike · Hack and Slash · 3D

Bendy: Lone Wolf
Shared: Action Roguelike · Hack and Slash · Arcade

Halls of Torment
Shared: Action Roguelike · Arcade · Hack and Slash

Wild Woods
Shared: Action Roguelike · Hack and Slash · Arcade

Crab Champions
Shared: Action Roguelike · Arcade · 3D

Death Must Die
Shared: Action Roguelike · Hack and Slash · Action

Stellar Blade™
Shared: Hack and Slash · Action · Third Person

Hades II
Shared: Hack and Slash · Action Roguelike · Action

BlazBlue Entropy Effect
Shared: Action Roguelike · Action · Hack and Slash

Hero Siege
Shared: Hack and Slash · Action Roguelike · Pixel Graphics

Ryse: Son of Rome
Shared: Hack and Slash · Action · Third Person

The First Berserker: Khazan
Shared: Hack and Slash · Third Person · 3D

Dead Cells
Shared: Action Roguelike · Hack and Slash · Pixel Graphics

Zombieville USA 3D
Shared: Arcade · Action Roguelike · Action

Castle Crashers®
Shared: Hack and Slash · Funny · Action

MADNESS: Project Nexus
Shared: Hack and Slash · Funny · 3D

Windblown
Shared: Action Roguelike · Hack and Slash · Action

Soulstone Survivors
Shared: Action Roguelike · Hack and Slash · Action