Games like Euclid Valley
Games like Euclid Valley include Vampire Survivors, Nova Drift, Enter the Gungeon, Brotato, and Megabonk. We matched them by the tags players give Euclid Valley on Steam (Arcade, Action Roguelike, Arena Shooter, 2D Platformer, and Difficult): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Indie

Nova Drift
Shared: Arcade · Action Roguelike · Arena Shooter

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Difficult

Brotato
Shared: Action Roguelike · Bullet Hell · Arena Shooter

Megabonk
Shared: Action Roguelike · Indie · Bullet Hell

Downwell
Shared: Action Roguelike · Arcade · Indie

Hades
Shared: Action Roguelike · Indie · Hack and Slash

Skul: The Hero Slayer
Shared: Action Roguelike · Indie · Action

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Arena Shooter

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Difficult

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Arcade

Exit the Gungeon
Shared: Arcade · Indie · Bullet Hell

Windowkill
Shared: Action Roguelike · Arcade · Indie

A Dance of Fire and Ice
Shared: Difficult · Arcade · Indie

Spelunky
Shared: Action Roguelike · Difficult · Indie

Death Must Die
Shared: Action Roguelike · Bullet Hell · Hack and Slash

Nuclear Throne
Shared: Action Roguelike · Difficult · Indie

Bit Blaster XL
Shared: Arcade · Difficult · Bullet Hell

Glyphica: Typing Survival
Shared: Action Roguelike · Arena Shooter · Bullet Hell

Rogue Legacy 2
Shared: Arcade · Indie · Difficult

BALL x PIT
Shared: Arcade · Action Roguelike · Bullet Hell

Super Hexagon
Shared: Arcade · Difficult · Indie

Have a Nice Death
Shared: Action Roguelike · Hack and Slash · 2D Platformer

SNKRX
Shared: Action Roguelike · Arena Shooter · Arcade