Games like Gearshifters
Games like Gearshifters include BALL x PIT, Nova Drift, FlatOut 2, Disney Speedstorm, and Bit Blaster XL. We matched them by the tags players give Gearshifters on Steam (Combat Racing, Shoot 'Em Up, Bullet Hell, Roguelite, and Side Scroller): closest matches first, and among equally close ones the better-known games.

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

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

FlatOut 2
Shared: Combat Racing · Driving · Racing

Disney Speedstorm
Shared: Combat Racing · Driving · Arcade

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

Star of Providence
Shared: Bullet Hell · Roguelite · Shoot 'Em Up

Need for Speed™ Heat
Shared: Combat Racing · Driving · Racing

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

Vampire Survivors
Shared: Bullet Hell · Roguelite · Arcade

Garfield Kart
Shared: Combat Racing · Driving · Arcade

Rogue: Genesia
Shared: Bullet Hell · Roguelite · Arcade

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Zombie Driver HD
Shared: Combat Racing · Driving · Arcade

Greedland
Shared: Shoot 'Em Up · Roguelite · Bullet Hell

R-Type Final 2
Shared: Shoot 'Em Up · Side Scroller · Arcade

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

Waves
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Halls of Torment
Shared: Bullet Hell · Roguelite · Arcade

Utopia Must Fall
Shared: Roguelite · Bullet Hell · Arcade

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

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

Ikaruga
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Titan Attacks!
Shared: Bullet Hell · Shoot 'Em Up · Side Scroller

Need for Speed™ Unbound
Shared: Combat Racing · Driving · Racing