Games like Regular Spacecraft - Defending the Mothership
Games like Regular Spacecraft - Defending the Mothership include Vampire Survivors, BALL x PIT, Nuclear Throne, 20 Minutes Till Dawn, and Nova Drift. We matched them by the tags players give Regular Spacecraft - Defending the Mothership on Steam (Action Roguelike, Bullet Hell, Shoot 'Em Up, Top-Down Shooter, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

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

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

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

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

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

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

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

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

Apocalypse Party
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Voidigo
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Blazing Beaks
Shared: Action Roguelike · Top-Down Shooter · Roguelite

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

Time Wasters
Shared: Action Roguelike · Bullet Hell · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Action Roguelike · Roguelite

Pathogenic
Shared: Bullet Hell · Top-Down Shooter · Action Roguelike