Games like Kobold Castle
Games like Kobold Castle include Shovel Knight: Treasure Trove, Vampire Survivors, Skul: The Hero Slayer, Rogue Legacy, and Broforce. We matched them by the tags players give Kobold Castle on Steam (Action, Retro, 2D, Cartoony, and Fantasy): closest matches first, and among equally close ones the better-known games.

Shovel Knight: Treasure Trove
Shared: Retro · 2D · Pixel Graphics

Vampire Survivors
Shared: 2D · Roguelite · Pixel Graphics

Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics

Rogue Legacy
Shared: Action · 2D · Platformer

Broforce
Shared: Action · 2D · Pixel Graphics

Pizza Tower
Shared: Cartoony · Action · Pixel Graphics

Bloodstained: Curse of the Moon
Shared: Action · Retro · 2D

SANABI
Shared: Action · Pixel Graphics · 2D

Katana ZERO
Shared: Action · Pixel Graphics · 2D

The Messenger
Shared: Retro · 2D · Action

UFO 50
Shared: Retro · Action · 2D

Rogue Legacy 2
Shared: Action · Roguelite · Arcade

Sonic Mania
Shared: 2D · Retro · Action

Super Meat Boy
Shared: 2D · Platformer · Pixel Graphics

Gravity Circuit
Shared: Action · 2D · Pixel Graphics

BALL x PIT
Shared: Action · Roguelite · Arcade

Jump King
Shared: Action · 2D · Pixel Graphics

Downwell
Shared: Pixel Graphics · Action · 2D

Risk of Rain (2013)
Shared: Action · Pixel Graphics · Platformer

Volgarr the Viking
Shared: Action · Retro · 2D

Out There Somewhere
Shared: 2D · Pixel Graphics · Retro

Bloodstained: Curse of the Moon 2
Shared: Action · Retro · 2D

Sonic Origins
Shared: Action · Retro · Pixel Graphics

Gato Roboto
Shared: Action · 2D · Pixel Graphics