Games like Frayspace
Games like Frayspace include Chippy, Deployment, THE FINALS, Halo: Spartan Assault, and Cyberhunt. We matched them by the tags players give Frayspace on Steam (Arena Shooter, Twin Stick Shooter, Top-Down Shooter, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Chippy
Shared: Twin Stick Shooter · Arena Shooter · Top-Down Shooter

Deployment
Shared: Arena Shooter · Top-Down Shooter · Shooter

THE FINALS
Shared: Shooter · PvP · Arena Shooter

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

Cyberhunt
Shared: Twin Stick Shooter · Arcade · 2D

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

SNKRX
Shared: Arena Shooter · Top-Down Shooter · Arcade

Sektori
Shared: Twin Stick Shooter · Arena Shooter · Arcade

Time Wasters
Shared: Twin Stick Shooter · Arena Shooter · 2D

State of Anarchy: Master of Mayhem
Shared: Top-Down Shooter · Twin Stick Shooter · Arena Shooter

Robot Roller-Derby Disco Dodgeball
Shared: Arena Shooter · PvP · Shooter

Geometry Wars: Retro Evolved
Shared: Twin Stick Shooter · Arcade · 2D

Kill The Crows
Shared: Top-Down Shooter · Arena Shooter · Arcade

UpGun
Shared: Shooter · PvP · Arena Shooter

Apewar
Shared: Shooter · Arena Shooter · PvP

Strike Force Heroes
Shared: Arena Shooter · Shooter · 2D

Bit Blaster XL
Shared: Shooter · Arcade · 2D

Tesla vs Lovecraft
Shared: Arena Shooter · Top-Down Shooter · Shooter

Titan Attacks!
Shared: Arena Shooter · Top-Down Shooter · Twin Stick Shooter

Planes, Bullets and Vodka
Shared: Arcade · Shooter · 2D

Renegade Ops
Shared: Twin Stick Shooter · Arcade · Top-Down

Nova Drift
Shared: Arena Shooter · Arcade · Shooter

Minishoot' Adventures
Shared: Twin Stick Shooter · Top-Down · Top-Down Shooter

Apex Legends™
Shared: Shooter · PvP · Team-Based