Games like Thunder Kid II: Null Mission
Games like Thunder Kid II: Null Mission include Broforce, Shovel Knight: Treasure Trove, Hotline Miami, Out There Somewhere, and Katana ZERO. We matched them by the tags players give Thunder Kid II: Null Mission on Steam (Action, Indie, Retro, Shooter, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Pixel Graphics · Indie

Shovel Knight: Treasure Trove
Shared: Retro · Indie · Pixel Graphics

Hotline Miami
Shared: Action · Indie · Pixel Graphics

Out There Somewhere
Shared: Indie · Pixel Graphics · Platformer

Katana ZERO
Shared: Action · Pixel Graphics · Indie

ZeroRanger
Shared: Indie · Action · Pixel Graphics

Intrusion 2
Shared: Action · Indie · Shooter

Axiom Verge
Shared: Indie · Action · Pixel Graphics

Hotline Miami 2: Wrong Number
Shared: Action · Pixel Graphics · Retro

Skul: The Hero Slayer
Shared: Action · Indie · Pixel Graphics

Huntdown
Shared: Action · Pixel Graphics · Shooter

Cuphead
Shared: Difficult · Platformer · Indie

Super Meat Boy
Shared: Indie · Platformer · Pixel Graphics

LUFTRAUSERS
Shared: Indie · Action · Pixel Graphics

SANABI
Shared: Action · Pixel Graphics · Indie

Devil Daggers
Shared: Indie · Action · Retro

VVVVVV
Shared: Indie · Pixel Graphics · Platformer

Blazing Chrome
Shared: Action · Retro · Indie

The Messenger
Shared: Retro · Pixel Graphics · Platformer

Celeste
Shared: Indie · Pixel Graphics · Difficult

UFO 50
Shared: Indie · Action · Retro

Bit Blaster XL
Shared: Shooter · Action · Difficult

Jump King
Shared: Indie · Pixel Graphics · Action

Angry Video Game Nerd Adventures
Shared: Indie · Action · Platformer