Games like Stellara Vanguard
Games like Stellara Vanguard include Vampire Survivors, Megabonk, Halls of Torment, 20 Minutes Till Dawn, and Enter the Gungeon. We matched them by the tags players give Stellara Vanguard on Steam (Action Roguelike, Bullet Hell, Roguelite, Indie, and Action): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

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

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

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

Brotato
Shared: Bullet Hell · Action Roguelike · Roguelite

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

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

Nuclear Throne
Shared: Action Roguelike · Indie · Bullet Hell

BALL x PIT
Shared: Roguelite · Bullet Hell · Action

Hades
Shared: Action Roguelike · Roguelite · Indie

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

Nova Drift
Shared: Bullet Hell · Roguelite · Action Roguelike

Star of Providence
Shared: Bullet Hell · Action Roguelike · Roguelite

Atomicrops
Shared: Bullet Hell · Action · Action Roguelike

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Action

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Pixel Graphics

Dungreed
Shared: Action Roguelike · Roguelite · Action

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Roboquest
Shared: Action Roguelike · Roguelite · Bullet Hell

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Noobs Want to Live
Shared: Bullet Hell · Action Roguelike · Action

Rogue Legacy
Shared: Action Roguelike · Indie · Action

Monsters are Coming!
Shared: Roguelite · Action · Bullet Hell