Games like Temtem: Swarm
Games like Temtem: Swarm include Megabonk, The Spell Brigade, Soulstone Survivors, Brotato, and Halls of Torment. We matched them by the tags players give Temtem: Swarm on Steam (Bullet Heaven, Creature Collector, Action Roguelike, Online Co-Op, and Roguelite): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite

The Spell Brigade
Shared: Bullet Heaven · Online Co-Op · Roguelite

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

Brotato
Shared: Action Roguelike · Bullet Heaven · Roguelike

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

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

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

Hades
Shared: Action Roguelike · Roguelite · Roguelike

Ravenswatch
Shared: Action Roguelike · Online Co-Op · Roguelike

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

Gunfire Reborn
Shared: Roguelite · Online Co-Op · Roguelike

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

Hades II
Shared: Roguelite · Action Roguelike · Roguelike

BALL x PIT
Shared: Roguelite · Action Roguelike · Bullet Hell

Jotunnslayer: Hordes of Hel
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Children of Morta
Shared: Online Co-Op · Action Roguelike · Roguelike

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Roguelike

Nova Drift
Shared: Action Roguelike · Roguelite · Bullet Hell

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

SYNTHETIK: Legion Rising
Shared: Roguelite · Action Roguelike · Online Co-Op

NIMRODS
Shared: Bullet Heaven · Action Roguelike · Roguelite