Games like Friendly Fire
Games like Friendly Fire include Megabonk, Deep Rock Galactic: Survivor, 20 Minutes Till Dawn, Vampire Survivors, and Death Must Die. We matched them by the tags players give Friendly Fire on Steam (Action Roguelike, Bullet Heaven, Action, Roguelite, and Casual): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Brotato
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

BALL x PIT
Shared: Action · Roguelite · Action Roguelike

Arms of God
Shared: Action Roguelike · Bullet Heaven · Roguelite

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

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

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

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

FatalZone
Shared: Action Roguelike · Bullet Hell · Roguelite

Time Wasters
Shared: Action Roguelike · Bullet Heaven · Roguelite

Nuclear Throne
Shared: Action Roguelike · Action · Bullet Hell

Nova Drift
Shared: Action Roguelike · Roguelite · Bullet Hell

Army of Ruin
Shared: Action Roguelike · Bullet Hell · Roguelite

Rocket Rats
Shared: Action Roguelike · Roguelite · Casual

Hell Maiden
Shared: Action Roguelike · Bullet Heaven · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Action