Games like Nebula
Games like Nebula include BALL x PIT, Nova Drift, Megabonk, Time Wasters, and Yet Another Zombie Survivors. We matched them by the tags players give Nebula on Steam (Bullet Heaven, Shoot 'Em Up, Twin Stick Shooter, Top-Down Shooter, and Roguelite): closest matches first, and among equally close ones the better-known games.
BALL x PIT
Shared: Roguelite · Shoot 'Em Up · Arcade
Nova Drift
Shared: Shoot 'Em Up · Roguelite · Bullet Heaven
Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite
Time Wasters
Shared: Bullet Heaven · Twin Stick Shooter · Action Roguelike
Yet Another Zombie Survivors
Shared: Bullet Heaven · Top-Down Shooter · Action Roguelike
Vampire Survivors
Shared: Action Roguelike · Roguelite · 2D
Rogue: Genesia
Shared: Bullet Heaven · Roguelite · Twin Stick Shooter
Deep Rock Galactic: Survivor
Shared: Bullet Heaven · Action Roguelike · Roguelite
20 Minutes Till Dawn
Shared: Shoot 'Em Up · Action Roguelike · Roguelite
SYNTHETIK 2
Shared: Top-Down Shooter · Roguelite · Twin Stick Shooter
SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Roguelite · Action Roguelike
NIMRODS
Shared: Bullet Heaven · Top-Down Shooter · Action Roguelike
Halls of Torment
Shared: Roguelite · Action Roguelike · Bullet Heaven
Voidigo
Shared: Twin Stick Shooter · Action Roguelike · Shoot 'Em Up
SNKRX
Shared: Shoot 'Em Up · Roguelite · Action Roguelike
Brotato
Shared: Bullet Heaven · Action Roguelike · Roguelike
Run Build Pew!
Shared: Bullet Heaven · Roguelite · Top-Down Shooter
The Spell Brigade
Shared: Bullet Heaven · Roguelite · Action Roguelike
Soulstone Survivors
Shared: Bullet Heaven · Roguelite · Action Roguelike
Nuclear Throne
Shared: Action Roguelike · Roguelike · Roguelite
Death Must Die
Shared: Bullet Heaven · Action Roguelike · Roguelite
Enter the Gungeon
Shared: Action Roguelike · Roguelike · Twin Stick Shooter
Blazing Beaks
Shared: Action Roguelike · Top-Down Shooter · Roguelite
Pathogenic
Shared: Bullet Heaven · Top-Down Shooter · Roguelike