Games like Knightfall Showdown
Games like Knightfall Showdown include Timberman, Broforce, Teenage Mutant Ninja Turtles: Shredder's Revenge, PUBG: BATTLEGROUNDS, and Apex Legends™. We matched them by the tags players give Knightfall Showdown on Steam (Battle Royale, Arcade, Pixel Graphics, Top-Down, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Timberman
Shared: Pixel Graphics · Multiplayer · Arcade

Broforce
Shared: Pixel Graphics · Action · Multiplayer

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Pixel Graphics · Multiplayer · Arcade

PUBG: BATTLEGROUNDS
Shared: Battle Royale · Multiplayer · Action

Apex Legends™
Shared: Battle Royale · Multiplayer · Action

SUPER CHICKEN JUMPER
Shared: Arcade · Pixel Graphics · 2D

Terraria
Shared: Multiplayer · Pixel Graphics · 2D

Vampire Survivors
Shared: Pixel Graphics · 2D · Arcade

Razortron 2000
Shared: Arcade · Racing · Top-Down

Need for Speed™ Heat
Shared: Multiplayer · Racing · Action

BALL x PIT
Shared: Arcade · Action · Pixel Graphics

SpeedRunners
Shared: Multiplayer · Racing · Action

Hero Siege
Shared: Pixel Graphics · Multiplayer · Top-Down

Need for Speed™ Unbound
Shared: Multiplayer · Racing · Action

NARAKA: BLADEPOINT
Shared: Battle Royale · Multiplayer · Action

Duck Game
Shared: Multiplayer · Pixel Graphics · Action

Pixel Gun 3D: PC Edition
Shared: Pixel Graphics · Multiplayer · Action

Hotline Miami
Shared: Pixel Graphics · Top-Down · Action

UFO 50
Shared: Pixel Graphics · Arcade · Action

Need for Speed™
Shared: Multiplayer · Racing · Action

Rivals of Aether
Shared: Pixel Graphics · Multiplayer · 2D

Drift86
Shared: Multiplayer · Racing · Arcade

Stardew Valley
Shared: Pixel Graphics · Multiplayer · Indie

Disney Speedstorm
Shared: Arcade · Multiplayer · Racing