Games like Boss Battle Arena
Games like Boss Battle Arena include Vampire Survivors, Halls of Torment, BALL x PIT, Megabonk, and Death Must Die. We matched them by the tags players give Boss Battle Arena on Steam (Action, Roguelike, Casual, Arcade, and Beat 'em up): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Halls of Torment
Shared: Action Roguelike · Roguelike · Action

BALL x PIT
Shared: Action · Arcade · Roguelike

Megabonk
Shared: Roguelike · Action Roguelike · Action

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

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

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

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

Nuclear Throne
Shared: Roguelike · Action Roguelike · Action

Hades
Shared: Action · Action Roguelike · Roguelike

Noobs Are Coming
Shared: Roguelike · Action Roguelike · Action

Dead Cells
Shared: Roguelike · Action Roguelike · Action

Soulstone Survivors
Shared: Roguelike · Action Roguelike · Bullet Hell

Crab Champions
Shared: Roguelike · Action Roguelike · Arcade

Hades II
Shared: Action · Roguelike · Action Roguelike

Seraph's Last Stand
Shared: Casual · Action Roguelike · Roguelike

Noobs Want to Live
Shared: Roguelike · Action · Bullet Hell

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

Nova Drift
Shared: Arcade · Bullet Hell · Action Roguelike

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Casual

Arms of God
Shared: Action Roguelike · Action · Arena Shooter

Rocket Rats
Shared: Casual · Action Roguelike · Action

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Indie

Rogue Legacy
Shared: Roguelike · Action · Action Roguelike