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

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

BALL x PIT
Shared: Roguelite · Bullet Hell · Arcade

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

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

The Spell Brigade
Shared: Roguelite · Bullet Hell · Action Roguelike

Rogue: Genesia
Shared: Action Roguelike · Bullet Hell · Roguelite

Nova Drift
Shared: Roguelite · Bullet Hell · Action Roguelike

Project Lazarus
Shared: Action Roguelike · Bullet Hell · Action

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Hades
Shared: Action Roguelike · Roguelite · Action

Goobies
Shared: Action Roguelike · Bullet Hell · Roguelite

Crab Champions
Shared: Action Roguelike · Arcade · 3D

Be My Horde
Shared: Action Roguelike · Bullet Hell · Roguelite

Magicraft
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Apocalypse Party
Shared: Action Roguelike · Bullet Hell · Roguelite

I Am Legion: Stand Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell