Games like Septic Savages
Games like Septic Savages include Megabonk, Skul: The Hero Slayer, UBERMOSH:BLACK, Rogue Legacy 2, and Hades. We matched them by the tags players give Septic Savages on Steam (Action, Indie, Twin Stick Shooter, Arcade, and Roguelike): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Indie · Roguelike · Action

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

UBERMOSH:BLACK
Shared: Action · Indie · Arcade

Rogue Legacy 2
Shared: Action · Arcade · Indie

Hades
Shared: Indie · Action · Roguelike

Windowkill
Shared: Action · Indie · Arcade

Rogue Legacy
Shared: Indie · Action · Roguelike

BALL x PIT
Shared: Action · Arcade · Roguelike

Enter the Gungeon
Shared: Roguelike · Indie · Twin Stick Shooter

Vampire Survivors
Shared: Indie · Roguelike · Action

Cyberhunt
Shared: Action · Indie · Twin Stick Shooter

Hades II
Shared: Action · Roguelike · Indie

UBERMOSH
Shared: Action · Indie · Arcade

Atomicrops
Shared: Action · Roguelike · Indie

The Binding of Isaac
Shared: Indie · Roguelike · Action

SYNTHETIK: Legion Rising
Shared: Indie · Action · Twin Stick Shooter

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

UBERMOSH Vol.3
Shared: Action · Indie · Arcade

Nex Machina
Shared: Action · Twin Stick Shooter · Arcade

Streets of Rage 4
Shared: Action · Indie · Arcade

Spelunky
Shared: Indie · Roguelike · Arcade

Nuclear Throne
Shared: Indie · Roguelike · Action

UBERMOSH:WRAITH
Shared: Action · Indie · Arcade

Juicy Realm
Shared: Action · Indie · Roguelike