Single-player games like Monster
Below are 17 single-player Steam games similar to Monster, 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 Monster page.
Ranked picks
- 1

Waifus Smash
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie and Casual with Monster.
Need a game with RPG element, rhythm-based combat and Waifus? Everything here in Waifus Smash. Control your hero to explore the world, defeat the enemy and boss under the exiciting background music to save the Obhiro village from threat.
- 2

Lens Life
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Casual with Monster.
Your upstairs house is rented to sisters, and as the landlord, you have already installed cameras of various angles in the room.You enjoy the pleasures of life peeping sisters,but one day find that they run into an emergency,You need to make a choice about this.
- 3

Orc Massage
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Strategy with Monster.
Orc Massage is a 3D adult simulation game. You play as an honest Orc who is trying to make a living with his business, but his monster girl clients have a bad habit of getting turned on by his "handy work". Will he stay professional or be seduced by his clients? That is all on you!
- 4

GLASS
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie and Casual with Monster.
Bring together desires that are scattered into bits and pieces. And discover the secrets of the 'World of Glass'.
- 5

少女妖精弹珠台 Elf Girl Pinball
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie and Casual with Monster.
More than just a "very happy" pinball game~!
- 6

Rabbit Burn
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie and Casual with Monster.
Fabulous riches, flying fists, and sensual embraces abound in this dazzling arena where rabbit men and bunny girls sprint to and fro, dodging explosions, brawling, making love, or just rocking out. It's the crazy, depraved billiards game, Rabbit Burn!
- 7

Manor of Mystic Courtesans
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Casual with Monster.
Manor of Mystic Courtesans♥ This is a place to find partners of every race, gender, and alternate dimension. Gorgeous artwork, seductive partners, and a plethora of extraordinary scenarios come together to make the most wild and lascivious adult novel game on Steam to date!
- 8

Working Sakuya
Single-player alternative to Monster — playable solo, no multiplayer required.
This game is a visual novel game consisting of animation for adults.
- 9

Stephen's Sausage Roll
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie with Monster.
A simple 3d puzzle game.
- 10

BoxIsland: Sokoban
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Strategy and Indie with Monster.
On the enigmatic Box Island, an ancient civilization has left behind puzzle-filled ruins. Players take on the role of a young explorer, yet the island is shrouded in a mystical force - only by pushing boxes can one unravel the island's secrets and escape this challenging labyrinthine world!
- 11

Tomb 盜墓
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Indie with Monster.
Tomb is an action/adventure game including exploration & discovery, platforming, and puzzle solving, fun fast-paced combat. At the core Tomb is a tight run & gun shooter that will test your skill, timing, reflexes. Building upon that solid arcade base, the game adds a ton of crazy weapons.
- 12

Monster 2
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Casual with Monster.
Although I had a good house, wealth, I had no girlfriend who could give me sexual comfort. But one night I felt very lucky when I found stray cat girls. After gaining their trust I had sexual pleasure with them. Grace and Lucy disliked it all at first but over time they both came closer to me.
- 13

Goblin
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Strategy with Monster.
The land is full of adventurers. I sit around the Guild Hall, awaiting my next quest. There are always plenty, as there is no end to goblins, yet somehow, these past couple of days, it has been quiet. Every guild member is giving it their all in order to quell as many goblins as possible.
- 14

Monster 3
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Casual with Monster.
Monster 3 is a puzzle video game in which the player pushes boxes around in a warehouse, trying to get them to storage locations.
- 15

Detective Mikami
Single-player alternative to Monster — playable solo, no multiplayer required.
The outbreak has hit the entire world like a truck. Yet, in some respects, the infestation of the population has affected Mikami and Hirano the most. That is because the two of them are so unlike one another yet they are stuck together, trying to live through this new, dangerous world.
- 16

NTR
Single-player alternative to Monster — playable solo, no multiplayer required. Shares Casual with Monster.
Enter the world of Block Blast, where you have to use your brain with every step, and you can also watch the magic cube explode, which is super rewarding!
- 17

Assassin and Sister
Single-player alternative to Monster — playable solo, no multiplayer required.
Embark on a journey to save the world in this bullet-filled adventure, born from our desire to mix the joy of open-ended exploration with a top-down shooter's juicy game feel.