Games like Nuns With Guns
Games like Nuns With Guns include Megabonk, Deep Rock Galactic: Survivor, BALL x PIT, Brotato, and Hades II. We matched them by the tags players give Nuns With Guns on Steam (Action Roguelike, Action, Bullet Heaven, Top-Down Shooter, and Shooter): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelike

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

BALL x PIT
Shared: Action · Action Roguelike · Roguelike

Brotato
Shared: Action Roguelike · Roguelike · Bullet Heaven

Hades II
Shared: Action · Action Roguelike · Roguelike

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

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action

Halls of Torment
Shared: Action Roguelike · Action · Roguelike

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelike

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Action · Action Roguelike

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

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Action

Hades
Shared: Action Roguelike · Action · Roguelike

The Spell Brigade
Shared: Bullet Heaven · Action Roguelike · Roguelike

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Heaven · Action

ANVIL
Shared: Action Roguelike · Top-Down Shooter · Action

Pathogenic
Shared: Top-Down Shooter · Action Roguelike · Roguelike

Returnal™
Shared: Action · Roguelike · Action Roguelike

Sephiria
Shared: Action Roguelike · Roguelike · Action

Tiny Rogues
Shared: Action Roguelike · Top-Down Shooter · Roguelike

Blazing Beaks
Shared: Action Roguelike · Action · Roguelike

20 Minutes Till Dawn
Shared: Action Roguelike · Top-Down Shooter · Bullet Heaven

Escape From Duckov
Shared: Action · Top-Down Shooter · Shooter