Games like BATTLE ARENA: Robot Apocalypse
Games like BATTLE ARENA: Robot Apocalypse include Nova Drift, Vampire Survivors, BALL x PIT, SNKRX, and Megabonk. We matched them by the tags players give BATTLE ARENA: Robot Apocalypse on Steam (Action Roguelike, Hero Shooter, Arena Shooter, Side Scroller, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Nova Drift
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

SNKRX
Shared: Action Roguelike · Arena Shooter · Roguelite

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

Time Wasters
Shared: Action Roguelike · Bullet Hell · Arena Shooter

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

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

Brotato
Shared: Action Roguelike · Bullet Hell · Arena Shooter

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

Star of Providence
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Rogue Legacy
Shared: Action Roguelike · Platformer · Roguelite

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Rogue Stormers
Shared: Action Roguelike · Side Scroller · Shoot 'Em Up

Roboquest
Shared: Action Roguelike · Roguelite · Bullet Hell

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelite

Bloodshed
Shared: Action Roguelike · Bullet Hell · Arena Shooter

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

Dungreed
Shared: Action Roguelike · Roguelite · Side Scroller

Utopia Must Fall
Shared: Action Roguelike · Roguelite · Bullet Hell

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

I Am Legion: Stand Survivors
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up