Games like Space Horde Attack
Games like Space Horde Attack include Vampire Survivors, Megabonk, Nova Drift, BALL x PIT, and 20 Minutes Till Dawn. We matched them by the tags players give Space Horde Attack on Steam (Action Roguelike, Bullet Hell, Roguelite, Space, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

Nova Drift
Shared: Bullet Hell · Roguelite · Action Roguelike

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

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

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelike

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

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

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

Hades
Shared: Action Roguelike · Roguelite · Roguelike

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelike

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

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Roguelike

I Am Legion: Stand Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Pass the Fear
Shared: Action Roguelike · Roguelite · Bullet Hell

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelite

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

暖雪 Warm Snow
Shared: Action Roguelike · Roguelite · Roguelike

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

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

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

EVERSPACE™
Shared: Action Roguelike · Space · Roguelite