Single-player games like Alien Carnage / Halloween Harry
Below are 8 single-player Steam games similar to Alien Carnage / Halloween Harry, 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 Alien Carnage / Halloween Harry page.
Ranked picks
- 1
Bio Menace
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
You are Snake Logan, a top CIA operative who likes to do things his own way. Metro City has fallen under the attack of hideous mutants and your mission is to fly recon over the city and report back. While circling over the city you're shot down by hostile forces and forced to crash land on the streets of Metro.
- 2
Hocus Pocus
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
Terexin, leader of the Council of Wizards, is sending the young sorcerer, Hocus, on a special mission to prove his worthiness.
- 3
Cosmo's Cosmic Adventure
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
What's green with red spots, has suction hands, and has an overbite like Bart Simpson? Of course, the answer is Cosmo! Cosmo is a young alien on his way to visit Disney World with his parents. That is, until their ship is struck by a blazing comet, forcing them to land on an uncharted planet.
- 4
Secret Agent
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
You are agent 006 - top agent of the government's secret organization committed to protecting the world against terrorists and power-mad criminals. Your mission: to parachute into a high -security island outpost and secure the plans to the ultimate satellite laser weapon, which was recently stolen from the government.
- 5
Monster Bash
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
Johnny Dash's bash 'em and smash 'em adventure takes him into the evil Under World of Count Chuck. The story starts when Johnny's dog Tex is kidnapped by the Count, along with hundreds of other pet dogs and cats.
- 6
Psychonauts
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
A Psychic Odyssey Through the Minds of Misfits, Monsters, and Madmen. This classic action/adventure platformer from acclaimed developers Double Fine Productions follows the story of a young psychic named Razputin.
- 7
Cave Story+
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
Run, jump, shoot, fly and explore your way through a massive action-adventure reminiscent of classic 8- and 16-bit games.
- 8
Prince of Persia: The Two Thrones™
Single-player alternative to Alien Carnage / Halloween Harry — playable solo, no multiplayer required. Shares Action with Alien Carnage / Halloween Harry.
The Prince of Persia, a seasoned warrior, returns from the Island of Time to Babylon with his love, Kaileena. Instead of the peace that he longs for, he finds his homeland ravaged by war and the kingdom turned against him.