Single-player games like functional
Below are 12 single-player Steam games similar to functional, 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 functional page.
Ranked picks
- 1

Block Motion
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Block motion is a puzzle / design game where you place functional blocks to design a working factory. Build your design, press play and watch your factory in action. You have the freedom to solve the challenges any way you want; The only limit is your imagination.
- 2

Hexahedra
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Hexahedra is a puzzle game about beautiful efficiency. Design, program, and optimize factories to build cubes, used galaxy-wide as crates, satellite housing, even chic coffins. Rewind the action to hunt for improvements. Compete with friends, and help a tiny octopus with a nightmare family visit.
- 3

The Farmer Was Replaced
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Program and optimize a drone to automate a farm and watch it do the work for you. Collect resources to unlock better technology and become the most efficient farmer in the world. Improve your problem solving and coding skills.
- 4

Linkito
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Unleash your brainpower in Linkito and ignite the insurgency! Link, build, solve, defuse, and decode by using your logic. Craft your own challenges in the level editor or tackle community creations.
- 5

The Signal State
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Set in a post-apocalyptic future, The Signal State puts your logic skills to the test with complex puzzles inspired by modular synthesizers. Repair machines, rebuild an abandoned farm, and be part of a revolution that will change the fate of agriculture once and for all.
- 6

CHR$(143)
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
A rich and challenging physics-based puzzle /logic /construction /programming game! Master ballistics, fluid mechanics, thermodynamics, chemical and nuclear reactions, use automation bricks, build structures, machines, vehicles, produce power, solve puzzles, pierce the fog and defeat CHR$!
- 7

QuantumPulse 2A
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Solve programming puzzles on a fictional computer with radio-based communication and unique limitations. Competitively optimize to compete on leaderboards against friends and the global community.
- 8

Copy Editor: A RegEx Puzzle
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Copy Editor is an intricate puzzle game that teaches you Regular Expressions (RegEx), commonly used in computer science and language theory. Build complex rules that process and revise famous texts for your wacky and demanding publisher!
- 9

TIS-100
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
TIS-100 is an open-ended programming game by Zachtronics, the creators of SpaceChem and Infinifactory, in which you rewrite corrupted code segments to repair the TIS-100 and unlock its secrets. It’s the assembly language programming game you never asked for!
- 10

SHENZHEN I/O
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
BUILD CIRCUITS. WRITE CODE. RTFM.
- 11

Human Resource Machine
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
Program little office workers to solve puzzles. Be a good employee! The machines are coming... for your job. From the creators of World of Goo and Little Inferno.
- 12

EXAPUNKS
Single-player alternative to functional — playable solo, no multiplayer required. Shares Simulation with functional.
The year is 1997. You used to be a hacker, but now you have the phage. You made a deal: one hack, one dose. There’s nothing left to lose… except your life.