Games like Gravitators
Games like Gravitators include Chippy, Insect Swarm, Bit Blaster XL, Sky Force Reloaded, and Bot Vice. We matched them by the tags players give Gravitators on Steam (Top-Down Shooter, Twin Stick Shooter, Shoot 'Em Up, Flight, and Difficult): closest matches first, and among equally close ones the better-known games.

Chippy
Shared: Twin Stick Shooter · Top-Down Shooter · Shoot 'Em Up

Insect Swarm
Shared: Top-Down Shooter · Shoot 'Em Up · Twin Stick Shooter

Bit Blaster XL
Shared: Shoot 'Em Up · Difficult · Shooter

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

Bot Vice
Shared: Top-Down Shooter · Shoot 'Em Up · Difficult

Cleared Hot
Shared: Flight · Top-Down Shooter · Twin Stick Shooter

Nex Machina
Shared: Twin Stick Shooter · Shoot 'Em Up · Arcade

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Twin Stick Shooter · Difficult

The Hong Kong Massacre
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter

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

Cyberhunt
Shared: Shoot 'Em Up · Twin Stick Shooter · Arcade

BALL x PIT
Shared: Top-Down Shooter · Shoot 'Em Up · Arcade

Brigador: Up-Armored Edition
Shared: Twin Stick Shooter · Top-Down Shooter · Difficult

HELLDIVERS™ Dive Harder Edition
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter

Halo: Spartan Assault
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter

RUINER
Shared: Top-Down Shooter · Twin Stick Shooter · Difficult

LUFTRAUSERS
Shared: Shoot 'Em Up · Arcade · 2D

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

Hotline Miami 2: Wrong Number
Shared: Difficult · Top-Down Shooter · Top-Down

Sektori
Shared: Twin Stick Shooter · Shoot 'Em Up · Top-Down Shooter

God's Trigger
Shared: Top-Down Shooter · Twin Stick Shooter · Shoot 'Em Up

12 is Better Than 6
Shared: Top-Down Shooter · Shooter · Action

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

Titan Attacks!
Shared: Top-Down Shooter · Shoot 'Em Up · Twin Stick Shooter