Single-player games like Theta and Paralldox on Worldlines
Below are 15 single-player Steam games similar to Theta and Paralldox on Worldlines, 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 Theta and Paralldox on Worldlines page.
Ranked picks
- 1
Snakeloop
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
Snakeloop is a challenging puzzle game based on a simple idea: What if you took classic Snake but inverted the goal and made it so you have to form a loop by eating your own tail.
- 2
Block Buster Billy
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
An alien family had a picnic on Billy's island. They had to leave in a hurry, causing Junior to forget his cubes. Can you help Billy figure out the mind-boggling alien puzzles?
- 3
Perplexicube
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
Perplexicube is a challenging isometric puzzler where you must work together with your past and future selves. You'll have to think ahead as you create loops backwards in time to set your futures selves up for success.
- 4
Sandy's Great Escape
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
A crabby twist on the sokoban (box-pushing) genre, where you use deaths to create shells and solve puzzles.
- 5
A Simple Square
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
A Simple Square is a minimalist puzzle game where every move changes the level. Slide in straight lines, erase the tiles behind you, plan your path, and reach the exit without trapping yourself.
- 6
Loophole
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
A time-bending puzzle game about working with - and against - your past selves. Subvert the rules of time travel, dodge paradoxes, and find a way to escape the loop.
- 7
A Good Snowman Is Hard To Build
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
An adorable puzzle game about being a monster and making snowmen.
- 8
Patrick's Parabox
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
A mind-bending recursive puzzle game about boxes within boxes within boxes within boxes. Learn to use infinity to your advantage as you explore a deep and elegant system.
- 9
Stephen's Sausage Roll
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
A simple 3d puzzle game.
- 10
Maxwell's puzzling demon
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
"Thermodynamic" puzzle where Maxwell's demon does work of block-pushing. Deal those hot blocks with cold blocks so that the demon doesn't get burnt.
- 11
Baba Is You
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
Baba Is You is a puzzle game where the rules you have to follow are present as blocks you can interact with. By manipulating them, you can change how the game works, repurpose things you find in the levels and cause surprising interactions!
- 12
Void Stranger
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
Place your faith and embrace the Void.
- 13
Drifting with Maxwell Cat: The Game
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required.
"Drifting with Maxwell Cat The Game" is a skateboarding game featuring meme characters navigating obstacle-filled levels. Customize your skateboard and pull off stunts to earn points. With vibrant art and intuitive controls, it's a fun arcade game for all skill levels.
- 14
Star Knight: Order of the Vortex
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required. Shares Indie with Theta and Paralldox on Worldlines.
Star Knight: Order of the Vortex is a rogue-lite, bullet-hell, shoot-em-up with the ability to create unique builds and synergies as you test your skills in action-packed gameplay. Choose your crew, upgrade your ship, and explore the unknown depths of the Vortex.
- 15
Order of the Sinking Star
Single-player alternative to Theta and Paralldox on Worldlines — playable solo, no multiplayer required.
From director Jonathan Blow (Braid, The Witness), Order of the Sinking Star is a narrative adventure set in a realm of magic and enigma. Solve over 1000 interconnected, hand-crafted puzzles, discover unique playable heroes, master evolving gameplay mechanics, and decipher a grand mystery.