Single-player games like ProxOS
Below are 8 single-player Steam games similar to ProxOS, 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 ProxOS page.
Ranked picks
- 1

OCTOPTICOM 3D
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
OCTOPTICOM 3D is a major upgrade to your favorite open-ended puzzle programming game about designing and optimizing optical computing devices. Featuring 3D graphics and gameplay, refined ui, rewritten simulation, all original levels and components plus new additions, histograms and more.
- 2

The Farmer Was Replaced
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
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.
- 3

SHENZHEN I/O
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
BUILD CIRCUITS. WRITE CODE. RTFM.
- 4

Comet 64
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
Comet 64 is a programming puzzle game. The year is 1984. All you got is a Comet 64 home computer and the operator's manual it came with.
- 5

while True: learn()
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
You’re a machine learning specialist who makes neural networks but your cat seems to be better at it. Now you must solve puzzles to build a cat-to-human translation system (who knows what else this cat is capable of!). Earn a fortune, buy kickass cat outfits, learn how machine learning really works!
- 6

Kaizen: A Factory Story
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
Kaizen is an open-ended puzzle automation game from the original Zachtronics team, set in 1980s Japan. Design, build, and optimize production lines to create iconic products, like calculators, camcorders, and arcade machines.
- 7

AI Learns To Drive
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
Train AI to drive! Create your own neural network and watch it evolve from chaos to mastery with the power of evolutionary algorithms and natural selection. Fine-tune the learning process to craft the ultimate AI driver, and test your creation in campaign challenges or on custom-built tracks.
- 8

Opus Magnum
Single-player alternative to ProxOS — playable solo, no multiplayer required. Shares Simulation with ProxOS.
Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, and SHENZHEN I/O. Design and build machines that assemble potions, poisons, and more using the alchemical engineer’s most advanced tool: the transmutation engine!