Games like One Boss One Fight
Games like One Boss One Fight include Hades, The Binding of Isaac: Rebirth, Risk of Rain 2, The Binding of Isaac, and Skul: The Hero Slayer. We matched them by the tags players give One Boss One Fight on Steam (Action Roguelike, Roguelite, Indie, Action, and Roguelike): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Roguelite · Indie

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

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

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

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

Ravenswatch
Shared: Action Roguelike · Roguelike · Action

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

Hades II
Shared: Roguelite · Action · Roguelike

Megabonk
Shared: Action Roguelike · Roguelite · Indie

Dead Cells
Shared: Action Roguelike · Roguelike · Roguelite

Curse of the Dead Gods
Shared: Action Roguelike · Roguelite · Action

Gunfire Reborn
Shared: Roguelite · Roguelike · Indie

Nuclear Throne
Shared: Action Roguelike · Indie · Roguelike

Risk of Rain (2013)
Shared: Action Roguelike · Indie · Roguelike

Brotato
Shared: Action Roguelike · Roguelike · Singleplayer

Enter the Gungeon
Shared: Action Roguelike · Roguelike · Indie

Dungreed
Shared: Action Roguelike · Roguelite · Roguelike

Sephiria
Shared: Action Roguelike · Roguelite · Roguelike

Rogue Legacy
Shared: Action Roguelike · Indie · Roguelike

SYNTHETIK: Legion Rising
Shared: Roguelite · Indie · Action Roguelike

ELDEN RING NIGHTREIGN
Shared: Roguelike · Souls-like · Singleplayer

Halls of Torment
Shared: Action Roguelike · Roguelite · Roguelike

NECROPOLIS: BRUTAL EDITION
Shared: Action Roguelike · Souls-like · Roguelike

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Roguelike