Games like CIPHER 61
Games like CIPHER 61 include SYNTHETIK 2, Deep Rock Galactic: Survivor, SYNTHETIK: Legion Rising, Deployment, and Shape of Dreams. We matched them by the tags players give CIPHER 61 on Steam (Arena Shooter, Top-Down Shooter, Twin Stick Shooter, Dungeon Crawler, and Roguelite): closest matches first, and among equally close ones the better-known games.

SYNTHETIK 2
Shared: Top-Down Shooter · Roguelite · Twin Stick Shooter

Deep Rock Galactic: Survivor
Shared: Top-Down Shooter · Roguelite · Arena Shooter

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

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

Shape of Dreams
Shared: Roguelite · PvE · Dungeon Crawler

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

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

Neon Sundown
Shared: Arena Shooter · Top-Down Shooter · Roguelite

The Last Stand: Aftermath
Shared: Top-Down Shooter · Roguelite · Shooter

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

Ziggurat
Shared: Roguelite · Shooter · Dungeon Crawler

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

Ziggurat 2
Shared: Arena Shooter · Roguelite · Dungeon Crawler

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

Glyphica: Typing Survival
Shared: Arena Shooter · Top-Down Shooter · Roguelite

X Invader
Shared: Arena Shooter · Twin Stick Shooter · Top-Down Shooter

Bounty of One
Shared: Arena Shooter · Top-Down Shooter · Roguelite

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

Section 13
Shared: Top-Down Shooter · Twin Stick Shooter · Roguelite

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

Vital Shell
Shared: Roguelite · Top-Down Shooter · Arena Shooter

Revita
Shared: Twin Stick Shooter · Dungeon Crawler · Roguelite

Hades
Shared: Roguelite · Dungeon Crawler · Indie

ATOMINE
Shared: Top-Down Shooter · Twin Stick Shooter · Dungeon Crawler