Games like Orbital Madness
Games like Orbital Madness include Vampire Survivors, Megabonk, Astro Prospector, Brotato, and Halls of Torment. We matched them by the tags players give Orbital Madness on Steam (Casual, Incremental, Roguelite, Action Roguelike, and Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Heaven

Astro Prospector
Shared: Incremental · Casual · Roguelite

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

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

BALL x PIT
Shared: Roguelite · Roguelike · Action Roguelike

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

Soulstone Survivors
Shared: Roguelite · Action Roguelike · Bullet Heaven

Yet Another Zombie Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

The Spell Brigade
Shared: Roguelite · Bullet Heaven · Action Roguelike

Nova Drift
Shared: Roguelite · Action Roguelike · Bullet Hell

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

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

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

Cursorblade
Shared: Action Roguelike · Roguelite · Bullet Heaven

Be My Horde
Shared: Action Roguelike · Roguelite · Bullet Heaven

Bills Must Be Paid
Shared: Incremental · Roguelite · Casual

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Roguelite · Bullet Heaven

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Roguelite · Bullet Heaven

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

Karate Survivor
Shared: Action Roguelike · Bullet Heaven · Roguelite

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Bullet Hell

Rocket Rats
Shared: Casual · Action Roguelike · Roguelite