Zachtronics logic and building games

If you like figuring out systems piece by piece, these Zachtronics games let you tinker with machines, cards, and code across 16 releases.

If you enjoy solving problems by building your own answers, you will feel at home in these 16 games from Zachtronics. Opus Magnum has you arranging arms and parts on a grid to turn simple atoms into finished products, while SHENZHEN I/O has you wiring components and writing short programs to make devices work. Last Call BBS changes pace with a mixed set of small challenges you can swap between when stuck, alongside card games, tactical battles and story-led detours.

Developed by Zachtronics

The Zachtronics Solitaire Collection

The Zachtronics Solitaire Collection

Eight solitaire games, each with its own rules and personality: a mahjong-tile deck, alchemical glass beads, a Tarot deck that reads your fortune…

98% of 952 Steam reviews are positivePlayers online now: 69$9.99
Last Call BBS

Last Call BBS

Log into a 90s bulletin board and fill it with factories, circuits, dungeons and card games, one download at a time.

94% of 1,226 Steam reviews are positivePlayers online now: 17$19.99
NERTS! Online

NERTS! Online

Race up to five rivals to clear your pile first, playing cards onto shared foundations faster than anyone else can.

95% of 1,699 Steam reviews are positivePlayers online now: 17Free
Möbius Front '83

Möbius Front '83

Defend America from an alternate-universe America using state-of-the-art 1980s military hardware in this intricate and tactical turn-based strategy…

74% of 329 Steam reviews are positivePlayers online now: 1$19.99
Eliza

Eliza

You are Evelyn, a burned-out engineer back after three years away, working as the human mouthpiece for Eliza, an AI counseling app.

92% of 1,009 Steam reviews are positivePlayers online now: 3$14.99
MOLEK-SYNTEZ

MOLEK-SYNTEZ

Use the MOLEK-SYNTEZ to create small molecules with various pharmacological effects from the comfort of your small Romanian apartment.

91% of 528 Steam reviews are positivePlayers online now: 1$9.99
EXAPUNKS

EXAPUNKS

Write little programs that slip into networks, do the job and get out, one puzzle at a time.

96% of 1,381 Steam reviews are positivePlayers online now: 14$19.99
ZACH-LIKE

ZACH-LIKE

ZACH-LIKE is a book of behind-the-scenes design documents from Zachtronics.

96% of 162 Steam reviews are positivePlayers online now: 1Free
Opus Magnum

Opus Magnum

Program alchemical arms on a hex grid and build machines that work any way you like.

97% of 6,100 Steam reviews are positivePlayers online now: 128$9.99
SHENZHEN I/O

SHENZHEN I/O

Design electronics on a budget, write the assembly to run them, and unwind with a round of solitaire when the specs bite back.

95% of 3,765 Steam reviews are positivePlayers online now: 45$14.99
SHENZHEN SOLITAIRE

SHENZHEN SOLITAIRE

NO ENGINEERING, ALL PROCRASTINATION! SHENZHEN SOLITAIRE is a brand-new solitaire variant originally developed for SHENZHEN I/O, and is now available…

97% of 206 Steam reviews are positivePlayers online now: 1$2.99
TIS-100

TIS-100

A broken computer from the 1980s lands on your desk, and the only way to fix it is to write assembly code by hand.

97% of 3,398 Steam reviews are positivePlayers online now: 12$6.99
Infinifactory

Infinifactory

Design conveyor belt assembly lines that weld, sort and ship products, solving open-ended 3D puzzles at your own pace.

95% of 1,793 Steam reviews are positivePlayers online now: 18$12.49
SpaceChem

SpaceChem

A puzzle game about building chemical factories from little instruction tracks and a pair of robotic arms called waldos.

95% of 2,635 Steam reviews are positivePlayers online now: 11$9.99
Ironclad Tactics

Ironclad Tactics

Ironclad Tactics is a fast-paced, card-based tactics game set in an alternate history Civil War - with steam-powered military robots!

75% of 238 Steam reviews are positive$14.99
EXAPUNKS: TEC Redshift Player

EXAPUNKS: TEC Redshift Player

The Redshift is a fictional handheld game console in the universe of the puzzle programming game EXAPUNKS.

94% of 32 Steam reviews are positiveFree

Published by Zachtronics

The Zachtronics Solitaire Collection

The Zachtronics Solitaire Collection

Eight solitaire games, each with its own rules and personality: a mahjong-tile deck, alchemical glass beads, a Tarot deck that reads your fortune…

98% of 952 Steam reviews are positivePlayers online now: 69$9.99
Last Call BBS

Last Call BBS

Log into a 90s bulletin board and fill it with factories, circuits, dungeons and card games, one download at a time.

94% of 1,226 Steam reviews are positivePlayers online now: 17$19.99
NERTS! Online

NERTS! Online

Race up to five rivals to clear your pile first, playing cards onto shared foundations faster than anyone else can.

95% of 1,699 Steam reviews are positivePlayers online now: 17Free
Möbius Front '83

Möbius Front '83

Defend America from an alternate-universe America using state-of-the-art 1980s military hardware in this intricate and tactical turn-based strategy…

74% of 329 Steam reviews are positivePlayers online now: 1$19.99
Eliza

Eliza

You are Evelyn, a burned-out engineer back after three years away, working as the human mouthpiece for Eliza, an AI counseling app.

92% of 1,009 Steam reviews are positivePlayers online now: 3$14.99
MOLEK-SYNTEZ

MOLEK-SYNTEZ

Use the MOLEK-SYNTEZ to create small molecules with various pharmacological effects from the comfort of your small Romanian apartment.

91% of 528 Steam reviews are positivePlayers online now: 1$9.99
EXAPUNKS

EXAPUNKS

Write little programs that slip into networks, do the job and get out, one puzzle at a time.

96% of 1,381 Steam reviews are positivePlayers online now: 14$19.99
ZACH-LIKE

ZACH-LIKE

ZACH-LIKE is a book of behind-the-scenes design documents from Zachtronics.

96% of 162 Steam reviews are positivePlayers online now: 1Free
Opus Magnum

Opus Magnum

Program alchemical arms on a hex grid and build machines that work any way you like.

97% of 6,100 Steam reviews are positivePlayers online now: 128$9.99
SHENZHEN I/O

SHENZHEN I/O

Design electronics on a budget, write the assembly to run them, and unwind with a round of solitaire when the specs bite back.

95% of 3,765 Steam reviews are positivePlayers online now: 45$14.99
SHENZHEN SOLITAIRE

SHENZHEN SOLITAIRE

NO ENGINEERING, ALL PROCRASTINATION! SHENZHEN SOLITAIRE is a brand-new solitaire variant originally developed for SHENZHEN I/O, and is now available…

97% of 206 Steam reviews are positivePlayers online now: 1$2.99
TIS-100

TIS-100

A broken computer from the 1980s lands on your desk, and the only way to fix it is to write assembly code by hand.

97% of 3,398 Steam reviews are positivePlayers online now: 12$6.99