Games like Mars Survivors
Games like Mars Survivors include BALL x PIT, Vampire Survivors, Nuclear Throne, Enter the Gungeon, and 20 Minutes Till Dawn. We matched them by the tags players give Mars Survivors on Steam (Action Roguelike, Bullet Hell, Top-Down Shooter, Twin Stick Shooter, and Action): closest matches first, and among equally close ones the better-known games.

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

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

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

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

Voidigo
Shared: Action Roguelike · Twin Stick Shooter · Bullet Hell

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

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

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

Time Wasters
Shared: Action Roguelike · Bullet Hell · Twin Stick Shooter

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Top-Down Shooter

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

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

Yet Another Zombie Survivors
Shared: Action Roguelike · Top-Down Shooter · Roguelite

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

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Rogue: Genesia
Shared: Bullet Hell · Action Roguelike · Twin Stick Shooter

Hades
Shared: Action Roguelike · Roguelite · Action

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

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

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