Games like Beyond Horizon
Games like Beyond Horizon include BALL x PIT, Time Wasters, Sky Force Reloaded, Nova Drift, and 20 Minutes Till Dawn. We matched them by the tags players give Beyond Horizon on Steam (Bullet Heaven, Bullet Hell, Shoot 'Em Up, Top-Down Shooter, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Bullet Hell · Action · Shoot 'Em Up

Time Wasters
Shared: Bullet Heaven · Bullet Hell · Twin Stick Shooter

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Top-Down Shooter

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Bullet Heaven

20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Action

Rogue: Genesia
Shared: Bullet Heaven · Bullet Hell · Twin Stick Shooter

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

Megabonk
Shared: Bullet Heaven · Bullet Hell · Action

KILL KNIGHT
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action

Nex Machina
Shared: Bullet Hell · Twin Stick Shooter · Action

Cyberhunt
Shared: Shoot 'Em Up · Action · Casual

Assault Android Cactus+
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter

Chippy
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter

Beat Hazard
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter

State of Anarchy: Master of Mayhem
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up

The Spell Brigade
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter

Waves
Shared: Bullet Hell · Shoot 'Em Up · Twin Stick Shooter

Greedland
Shared: Shoot 'Em Up · Bullet Hell · Twin Stick Shooter

Survivors of the Dawn
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter

NIMRODS
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter

Yet Another Zombie Survivors
Shared: Bullet Heaven · Top-Down Shooter · Arcade

Arms of God
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter