Games like HYPERGUN
Games like HYPERGUN include Hades, Gunfire Reborn, Vampire Survivors, Megabonk, and Nova Drift. We matched them by the tags players give HYPERGUN on Steam (Action Roguelike, Action, Indie, Roguelite, and FPS): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Roguelite · Indie

Gunfire Reborn
Shared: Roguelite · FPS · Indie

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

Megabonk
Shared: Action Roguelike · Roguelite · Indie

Nova Drift
Shared: Action Roguelike · Roguelite · Shoot 'Em Up

BALL x PIT
Shared: Action · Roguelite · Action Roguelike

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Indie

Hades II
Shared: Action · Roguelite · Action Roguelike

Ziggurat
Shared: Action · Roguelite · Action Roguelike

Deadlink
Shared: Action Roguelike · FPS · Roguelite

Roboquest
Shared: Action Roguelike · FPS · Roguelite

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

BPM: BULLETS PER MINUTE
Shared: Action · FPS · Indie

Halls of Torment
Shared: Action Roguelike · Roguelite · Action

Bloodshed
Shared: Action Roguelike · Action · FPS

SNKRX
Shared: Action Roguelike · Roguelite · Arena Shooter

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

Heavy Bullets
Shared: Action · Indie · Action Roguelike

Rogue Legacy
Shared: Action Roguelike · Indie · Action

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

Brotato
Shared: Action Roguelike · Roguelike · Roguelite

Abyssus
Shared: FPS · Roguelite · Action Roguelike

SYNTHETIK: Legion Rising
Shared: Indie · Action · Roguelite

Streets of Rogue
Shared: Action Roguelike · Roguelite · Action