Single-player games like Thunder Kid II: Null Mission
Below are 15 single-player Steam games similar to Thunder Kid II: Null Mission, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Thunder Kid II: Null Mission page.
Ranked picks
- 1

Thunder Kid
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action with Thunder Kid II: Null Mission.
Take on the forces of the Robot Empire in this Low-Poly 3D Run 'n' Gun Action Game!
- 2

Escape from Terror City
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
3D Run'n'Gun Arcade-Style Action! Fight the Mechanized Forces of the Argus Empire and Escape from Terror City!
- 3

ARMED SEVEN
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a...
- 4

Intrusion 2
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
"This is some of the most fun I've had with a game so far this year, and it will go down as one of the best side-scrolling shooters of all time." - 9/10, Destructoid
- 5

GIGANTIC ARMY
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Side-scrolling mech-shooting bad-assery is BACK!GIGANTIC ARMY is a heartfelt homage to 16-bit era mech shooters such as Cybernator / Assault Suits Valken, Metal Warriors, and Front Mission: Gun Hazard, developed by the studio behind the acclaimed shooter SATAZIUS.
- 6

Duck Paradox
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Shoot bouncing bullets in this roguelike precision platformer killing corrupted ducks while searching for Dr. Paraducks’ beloved pet throughout the multiverse! To return to safety you’ll need to tackle difficult-to-master trials, run after run, earning upgrades, while maintaining your sanity!
- 7

Ikaruga
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Shoot! Dodge! and... Get Hit!? "Ikaruga" is a vertical shoot 'em up that features an unique polarity-switching gameplay. Switch the ship's polarity and "get hit and absorb" enemy bullets! Achieve High Score with the chain bonus!
- 8

LUFTRAUSERS
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
The skies are aflame and the seas will overflow with wreckage in Vlambeer’s stylish arcade shooter LUFTRAUSERS! Take to the skies in customized fighter planes to battle battleships, submarines, and rival aces for glory, honor, and high scores.
- 9

And All Would Cry Beware!
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action with Thunder Kid II: Null Mission.
90s-style shooter meets Metroidvania. Step through a portal to a mysterious alien world, and discover the fate of the Lost Expedition.
- 10

Venusian Vengeance
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
In the year is 196X the Soviets won the space race and colonized Venus. Now the Americans have sent Sgt. Jon Dagger to Venus to destroy the Secret Soviet Science Facility.
- 11

Ninja Outbreak
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Survive in an off-world research station that has been overrun by a contagion that turns its victims into bloodthirsty Ninja.
- 12

Cold Vengeance
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
When Canada invades the USA, Sgt. Jon Dagger must run and gun his way across the ruins of America to the Frozen North to deliver Cold Vengeance.
- 13

Kill the Superweapon
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
3D Twin-Stick Action game where bosses can roam from room to room in pursuit of the player. Samantha Kill is on a mission to take down Abaddon Inc. and their Bio-Mechanical Supersoldiers.
- 14

Space Captain McCallery - Episode 1: Crash Landing
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Space Pirate Captain McCallery has Crash Landed on an alien planet! Explore a strange and hostile alien world in this Low-Poly 3D Action-Adventure game.
- 15

Space Captain McCallery - Episode 2: Pilgrims in Purple Moss
Single-player alternative to Thunder Kid II: Null Mission — playable solo, no multiplayer required. Shares Action and Indie with Thunder Kid II: Null Mission.
Space Pirate Captain McCallery explores a mysterious ruin in an alien swamp in search of treasure in this Low-Poly 3D Action-Adventure game.