Games like Super GunWorld 2
Games like Super GunWorld 2 include Dust: An Elysian Tail, Rogue Legacy 2, UnEpic, Dungeon Munchies, and Hollow Knight. We matched them by the tags players give Super GunWorld 2 on Steam (Action, Adventure, Indie, RPG, and 2D): closest matches first, and among equally close ones the better-known games.

Dust: An Elysian Tail
Shared: Action · Indie · Adventure

Rogue Legacy 2
Shared: Action · Indie · Platformer

UnEpic
Shared: Indie · RPG · Action

Dungeon Munchies
Shared: Action · Indie · Adventure

Hollow Knight
Shared: Platformer · Indie · 2D

ICEY
Shared: Action · Adventure · Indie

Rogue Legacy
Shared: Indie · Action · Platformer

Skul: The Hero Slayer
Shared: Action · Indie · 2D

The Vagrant
Shared: Action · RPG · 2D

Eastern Exorcist
Shared: Action · RPG · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Adventure

Broforce
Shared: Action · 2D · Indie

Hollow Knight: Silksong
Shared: Indie · 2D · Platformer

Trine 5: A Clockwork Conspiracy
Shared: Action · Adventure · RPG

Magicite
Shared: Indie · RPG · Adventure

Bloodstained: Ritual of the Night
Shared: Action · RPG · Adventure

SANABI
Shared: Action · Adventure · Indie

Zombotron
Shared: Action · Adventure · Indie

Bladed fury
Shared: Action · Indie · Adventure

Mark of the Ninja
Shared: Indie · Action · Platformer

UFO 50
Shared: Indie · Action · 2D

BEEP
Shared: Indie · Adventure · Platformer

Deadlight
Shared: Action · Indie · Adventure

Nine Sols
Shared: Action · 2D · Platformer