Single-player games like KILLBUG
Below are 18 single-player Steam games similar to KILLBUG, 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 KILLBUG page.
Ranked picks
- 1

Turbo Overkill
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Enter Paradise as Johnny Turbo—half-metal, half-human, all-murder machine. Clean up the streets with a chainsaw leg, 15+ weapons and your hovercar as you battle the rogue AI Syn, rival bounty hunters and cyberpunks aplenty. Apogee’s most outrageous FPS since Duke Nukem 3D. Good hunting, Sir!
- 2

Boomerang X
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Harness the power of a mystical boomerang to fling yourself through the air in this acrobatic arena shooter. Slice, fly, and blast through swarms of evil creatures on an abandoned island with a cryptic past. Stay agile or meet your doom.
- 3

hate.net
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
An abandoned arena shooter overtaken by bots. You are a mere passerby, a witness to a world that has long been lost to fake accounts and false advertisers. Thousands before you, and thousands after you.
- 4

Devil Daggers
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Devil Daggers is a fast-paced shooter that places you in an abyssal arena to face endless legions of demons. Armed with versatile magic daggers and a fluid movement system, fight to survive as long as you can.
- 5

High Hell
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
High Hell is a neon-soaked, arcade-action first-person shooter from Terri Vellmann (Heavy Bullets) and Doseone (Enter the Gungeon, Gang Beasts).
- 6

MULLET MADJACK
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
MULLET MADJACK is a HIGH-OCTANE-ACTION SHOOTER that put you directly inside a CLASSIC ANIME. Pick your favorite weapon and reach the last floor; Beat your best time or try again. Haste makes waste… OF YOUR ENEMIES!
- 7

Rise of the Triad
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Apogee Software and Interceptor Entertainment proudly present the rebirth of the cult-classic first-person shooter, “Rise of the Triad”. Bigger, better and more ludicrous than ever before.
- 8

STRAFE: Gold Edition
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
STRAFE® is the worlds bloodiest roguelike first-person shooter! Featuring mind melting secrets and persistent gore that allows you to paint levels red with the excessive entrails of your enemies. 30+ weapons, 20+ enemies, & a red hot soundtrack.
- 9

ULTRAKILL
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
ULTRAKILL is a fast-paced ultra-violent retro FPS that combines the skill-based style scoring of character action games with the unadulterated carnage inspired by the best shooters of the '90s. Rip apart your foes with varied destructive weaponry and shower in their blood to regain your health.
- 10

Quake
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Developed by the award-winning id Software, Quake® is the ground-breaking, original dark fantasy first-person shooter that inspires today’s retro-style FPS games. With Quake (Enhanced), experience the authentic, updated, and visually enhanced version of the original.
- 11

DOOM Eternal
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Hell’s armies have invaded Earth. Become the Slayer in an epic single-player campaign to conquer demons across dimensions and stop the final destruction of humanity. The only thing they fear... is you.
- 12

HYPER DEMON
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
HYPER DEMON is an FPS like no other. a pearl of lightning. a dream from the future. a drop of poison. a swan song. The faster you slay demons, the harder the game and the higher your score. There is an end. Will it see you?
- 13

Screencheat
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Screencheat is a ridiculous competitive split-screen first-person shooter where everyone is invisible, so players are forced to look at each other’s screens to win. Supporting both local and online multiplayer, combat in Screencheat is fast and furious with a wide variety of one-hit kill weapons.
- 14

Feather
Single-player alternative to KILLBUG — playable solo, no multiplayer required.
Feather is a multiplayer game about exploration, relaxation and immersion. Transform yourself into a bird, take flight, and enjoy a zen-like, picturesque landscape on your own terms. Swoop, glide, and backflip your way around mysterious locations to uncover hidden paths that only birds can follow!
- 15

Roombo: First Blood
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Roombo: First Blood is a comedic, top-down, stealth-action game about being a robot vacuum cleaner and fending off burglars from your home. A short, experimental game and the first in the JUSTICE SUCKS series.
- 16

JUSTICE SUCKS: Tactical Vacuum Action
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
JUSTICE SUCKS is a stealth/action game about a killer robot vacuum cleaner on a quest for vengeance through a 90s TV universe. Stalk your prey, hack smart devices, turn them into deadly traps and consume the blood of your enemies to unleash devastating powers.
- 17

The American Dream
Single-player alternative to KILLBUG — playable solo, no multiplayer required. Shares Action with KILLBUG.
Look down the barrel of a future where all your everyday needs are solved with guns.
- 18

TRIOS - lofi beats / numbers to chill to
Single-player alternative to KILLBUG — playable solo, no multiplayer required.
TRIOS is a relaxing, minimalist maths puzzle game. Take your time, chill out with some numbers. Deceptively simple, surprisingly challenging.