Games like Gacha Fever
Games like Gacha Fever include Deep Rock Galactic: Survivor, Brotato, Megabonk, Yet Another Zombie Survivors, and Nova Drift. We matched them by the tags players give Gacha Fever on Steam (Bullet Heaven, Arena Shooter, Roguelite, Top-Down Shooter, and Cute): closest matches first, and among equally close ones the better-known games.

Deep Rock Galactic: Survivor
Shared: Bullet Heaven · Roguelite · Top-Down Shooter

Brotato
Shared: Bullet Heaven · Bullet Hell · Arena Shooter

Megabonk
Shared: Bullet Heaven · Roguelite · Survival

Yet Another Zombie Survivors
Shared: Bullet Heaven · Top-Down Shooter · Roguelite

Nova Drift
Shared: Roguelite · Arena Shooter · Bullet Heaven

20 Minutes Till Dawn
Shared: Roguelite · Survival · Top-Down Shooter

Arms of God
Shared: Bullet Heaven · Top-Down Shooter · Arena Shooter

Vampire Survivors
Shared: Roguelite · Bullet Hell · 2D

BALL x PIT
Shared: Roguelite · Top-Down Shooter · Bullet Hell

Time Wasters
Shared: Bullet Heaven · Roguelite · Arena Shooter

Death Must Die
Shared: Roguelite · Bullet Heaven · Bullet Hell

Soulstone Survivors
Shared: Bullet Heaven · Roguelite · Bullet Hell

Vital Shell
Shared: Bullet Heaven · Roguelite · Arena Shooter

Rogue: Genesia
Shared: Bullet Heaven · Roguelite · Bullet Hell

Geometry Arena
Shared: Bullet Heaven · Arena Shooter · Top-Down Shooter

Halls of Torment
Shared: Roguelite · Bullet Hell · Bullet Heaven

SNKRX
Shared: Arena Shooter · Roguelite · Top-Down Shooter

Nordic Ashes: Survivors of Ragnarok
Shared: Bullet Heaven · Roguelite · Bullet Hell

FatalZone
Shared: Roguelite · Survival · Arena Shooter

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

Geometry Arena 2
Shared: Bullet Heaven · Arena Shooter · Top-Down Shooter

Funguys Swarm
Shared: Bullet Heaven · Roguelite · Cute

Tower of Babel: Survivors of Chaos
Shared: Bullet Heaven · Roguelite · Bullet Hell

Glyphica: Typing Survival
Shared: Arena Shooter · Top-Down Shooter · Roguelite