Games like Insectoid Descent
Games like Insectoid Descent include Cyberhunt, Insect Swarm, Metal Slug: Awakening, Chippy, and BALL x PIT. We matched them by the tags players give Insectoid Descent on Steam (Shoot 'Em Up, Top-Down Shooter, Twin Stick Shooter, Sandbox, and Shooter): closest matches first, and among equally close ones the better-known games.
Cyberhunt
Shared: Shoot 'Em Up · Twin Stick Shooter · Arcade
Insect Swarm
Shared: Shoot 'Em Up · Top-Down Shooter · Shooter
Metal Slug: Awakening
Shared: Shoot 'Em Up · Twin Stick Shooter · Arcade
Chippy
Shared: Twin Stick Shooter · Shoot 'Em Up · Top-Down Shooter
BALL x PIT
Shared: Shoot 'Em Up · Arcade · Top-Down Shooter
Bit Blaster XL
Shared: Shoot 'Em Up · Shooter · Arcade
Halo: Spartan Assault
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter
Bot Vice
Shared: Top-Down Shooter · Shoot 'Em Up · Arcade
Sky Force Reloaded
Shared: Shoot 'Em Up · Top-Down Shooter · Arcade
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Arcade · Shooter
Turnip Boy Robs a Bank
Shared: Shoot 'Em Up · Top-Down Shooter · Twin Stick Shooter
Beat Hazard
Shared: Twin Stick Shooter · Shoot 'Em Up · 2D
Minishoot' Adventures
Shared: Twin Stick Shooter · Top-Down · Top-Down Shooter
Sektori
Shared: Shoot 'Em Up · Twin Stick Shooter · Arcade
Waves
Shared: Shoot 'Em Up · Twin Stick Shooter · Shooter
Escape From Duckov
Shared: Top-Down Shooter · Shooter · Action
SNKRX
Shared: Top-Down Shooter · Shoot 'Em Up · Arcade
State of Anarchy: Master of Mayhem
Shared: Top-Down Shooter · Shoot 'Em Up · Twin Stick Shooter
Crimsonland
Shared: Shooter · Top-Down Shooter · Twin Stick Shooter
DoDonPachi Resurrection
Shared: Shoot 'Em Up · Top-Down Shooter · Shooter
Terraria
Shared: Sandbox · 2D · Adventure
Shadowgrounds
Shared: Top-Down Shooter · Shooter · Top-Down
The Hong Kong Massacre
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter
Nex Machina
Shared: Twin Stick Shooter · Shoot 'Em Up · Arcade