Single-player games like ULTRABUGS
Below are 13 single-player Steam games similar to ULTRABUGS, 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 ULTRABUGS page.
Ranked picks
- 1

Space Smash
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Fast-paced retro shmup where space keeps shrinking. Collect energy orbs, avoid danger, unlock ships, and chase the highest score in this addictive arcade shooter.
- 2

Chippy
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Chip destructible bosses apart pixel-by-pixel in this twin-stick bullet-hell shooter.
- 3

Sektori
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action with ULTRABUGS.
Sektori is an intense, fast paced twin-stick shooter infused with hard hitting techno music. A game where the high-adrenaline gameplay, visuals, and music come together to transport you into another state of consciousness.
- 4

Space War: Infinity
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Vertical semi-procedural shmup with upgrades, real-time enemy waves, and infinite replayability. Level up your ship, unlock 20+ weapons, defeat 5 bosses, and survive endless bullet-hell combat.
- 5

Titan Attacks!
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
As the last surviving tank commander on Earth, single-handedly turn back the evil invading alien army, drive back the Titans across the Solar System, and defeat them on their homeworld... Titan Attacks has the same easy-to-learn and addictive gameplay of the classic arcade shoot 'em up, but is packed full of extras - new features, new...
- 6

#KILLALLZOMBIES
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
#KILLALLZOMBIES is an insane twin-stick zombie shooter with Twitch streaming interactions, where you survive hordes of zombies on a dynamically changing arena and spectators may affect gameplay via special Twitch chat commands.
- 7

Assault Android Cactus+
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Assault Android Cactus is an intense arcade style twin stick shooter - pick from one of nine unique synthetic heroines and blast your way through overwhelming robots hordes to save the ship from its own workforce. Supports single player and local co-op game modes.
- 8

Ultratron
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Experience the addictive gameplay of old-school arcade favourites, updated and improved for the 21st century! Unique retro-futuristic sound and graphics, player responsive difficulty, and a subtle system of tactics combined with classic gameplay make Ultratron a fun and hypnotic arcade blast.
- 9

Nuclear Throne
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Nuclear Throne is a post-apocalyptic roguelike-like top-down shooter. Not 'the final hope of humanity' post-apocalyptic, but 'humanity is extinct and mutants and monsters now roam the world' post-apocalyptic. Can you reach the Nuclear Throne?
- 10

LUFTRAUSERS
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
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.
- 11

Serious Sam: The Random Encounter
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Choose your weapons and take aim at the most random Serious Sam adventure yet!
- 12

Super Crate Box
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
Vlambeer's SUPER CRATE BOX is coming to bring back the glory of the golden arcade age, when all that really mattered was getting on that high score list. Grab your baseball cap and loosen your pants, it's time to fight endless hordes of enemies and collect every weapon crate you can.
- 13

GUN GODZ
Single-player alternative to ULTRABUGS — playable solo, no multiplayer required. Shares Action and Indie with ULTRABUGS.
GUN GODZ is a first person shooter about gun, gangster rap and the rich culture of Venus. Featuring a fully Venusian soundtrack by Jukio 'KOZILEK' Kallio and a single English track with rap lyrics by Adam 'Doseone' Kidd.