Games like REMEDIUM: Sentinels
Games like REMEDIUM: Sentinels include Megabonk, Soulstone Survivors, Brotato, Yet Another Zombie Survivors, and Vampire Survivors. We matched them by the tags players give REMEDIUM: Sentinels on Steam (Action Roguelike, Bullet Heaven, Bullet Hell, Roguelite, and Shooter): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Hell · Bullet Heaven

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Death Must Die
Shared: Action Roguelike · Bullet Hell · Roguelite

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Roguelite

The Spell Brigade
Shared: Bullet Heaven · Bullet Hell · Roguelite

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Singleplayer

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

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

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Roguelite

Army of Ruin
Shared: Action Roguelike · Bullet Hell · Roguelite

Arms of God
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Bullet Heaven · Roguelite

Goobies
Shared: Action Roguelike · Bullet Hell · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades II
Shared: Roguelite · Action Roguelike · Roguelike

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelite

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