Games like Skycadia
Games like Skycadia include Vampire Survivors, Megabonk, Halls of Torment, Boneraiser Minions, and BALL x PIT. We matched them by the tags players give Skycadia on Steam (Action Roguelike, Bullet Hell, Pixel Graphics, Roguelite, and 3D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

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

Death Must Die
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

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

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

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Nuclear Throne
Shared: Action Roguelike · Pixel Graphics · Bullet Hell

Hades
Shared: Action Roguelike · Roguelite · Indie

Brotato
Shared: Bullet Hell · Action Roguelike · Singleplayer

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

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

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

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Goobies
Shared: Action Roguelike · Bullet Hell · Roguelite

Dungreed
Shared: Action Roguelike · Pixel Graphics · Roguelite

Yet Another Zombie Survivors
Shared: Action Roguelike · Roguelite · Indie

Nova Drift
Shared: Bullet Hell · Action Roguelike · Roguelite

Astro Prospector
Shared: Action Roguelike · Roguelite · Bullet Hell

Seraph's Last Stand
Shared: Action Roguelike · Bullet Hell · Pixel Graphics

Atomicrops
Shared: Bullet Hell · Action Roguelike · Pixel Graphics