Single-player games like Immortal Mantis
Below are 11 single-player Steam games similar to Immortal Mantis, 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 Immortal Mantis page.
Ranked picks
- 1

Immortal Mantis: Revenge
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and RPG with Immortal Mantis.
Solve puzzles while uncover two points of view of a story. The serial killer known as Mantis commits crimes freely while Sergei, his adopted brother, is in charge of preventing his mysterious objective from being completed.
- 2

8AM
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and Casual with Immortal Mantis.
"8AM" is a suspense game where you find yourself trapped in a room, watching a family through cameras. Without explanations, you must decide if strange events occur night after night. Being correct extends the time, seeking your release by 8:00 a.m.
- 3

Cut to the Core
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and Casual with Immortal Mantis.
How much of someone can you cut away before there's nothing left? Find out in this chilling kinetic visual novel - IF YOU DARE!
- 4

CORPSE FACTORY
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and Casual with Immortal Mantis.
Discard your sense of morality and enter the world of CORPSE FACTORY. An obscure website allows users to request a death. Victims supposedly receive a photograph of their own corpse before they are killed! With English voice acting by an all-star cast.
- 5

a pet shop after dark
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and Casual with Immortal Mantis.
PETSITTER WANTED. A horror point-and-click adventure game. Water the plants, feed the pets, and DON'T turn off the lights.
- 6

The Count Lucanor
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and RPG with Immortal Mantis.
Pixel adventure inspired by classics like Zelda and Silent Hill.
- 7

FAITH: The Unholy Trinity
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie with Immortal Mantis.
What you are about to do has not been approved by the Vatican. As a young priest, struggle against demons, cultists, and your own weakening faith in this pixel horror game inspired by the era of classic 8-bit gaming and the "Satanic Panic" of the 1980s.
- 8

The Test: Secrets of the Soul
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and RPG with Immortal Mantis.
You will answer a series of questions that will reveal things from deep within. Some will be uncomfortable, but with great knowledge comes great sacrifice. Can you make it all the way through The Test, and are you SURE you want the answers you seek? For it is time to unlock "Secrets of the Soul..."
- 9

Sapo 3D
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Indie and Casual with Immortal Mantis.
A 3D linear collect-a-thon platformer about a frog. Collect golden flies, unlock new worlds, and interact with a variety of mechanics and powerups. Finally, discover what lies behind the great gate.
- 10

Lost Oliver
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required. Shares Casual with Immortal Mantis.
Lost Oliver is a puzzle game heavily inspired by Pokémon. Control little Oliver's mother and use her special abilities to clear the way and rescue her lost baby.
- 11

Hell Being
Single-player alternative to Immortal Mantis — playable solo, no multiplayer required.
Hell Being is a metroidvania where the player explores hell as a hell-born creature, face its challenges and monsters to unlock new powers and find a way out from the injustice of being born in this place.