Coincidence
@coincidence.games
Coincidence is a cooperative game studio created by ex-Zachtronics developers. Zach Barth is no longer teaching high school and is making games again.
Kaizen: A Factory Story is now available on the itch.io store! In addition to getting DRM-free builds of the game for Windows, Mac, and Linux, you also get a Steam key!
astralogicalgames.itch.io/kaizen-a-fac...
astralogicalgames.itch.io/kaizen-a-fac...
Kaizen: A Factory Story by Astra Logical
Kaizen is an open-ended puzzle automation game from the original Zachtronics team, set in 1980s Japan.
astralogicalgames.itch.io
October 3, 2025 at 8:00 PM
Kaizen: A Factory Story is now available on the itch.io store! In addition to getting DRM-free builds of the game for Windows, Mac, and Linux, you also get a Steam key!
astralogicalgames.itch.io/kaizen-a-fac...
astralogicalgames.itch.io/kaizen-a-fac...
Bonus Puzzle #10 - DESIGNER'S NOTEBOOK
... which is actually not a puzzle, but a set of 12 new puzzles, most of which require you to design a production line able to build one of two different products using conditional inputs and commands. It's challenging!
steamcommunity.com/games/227549...
... which is actually not a puzzle, but a set of 12 new puzzles, most of which require you to design a production line able to build one of two different products using conditional inputs and commands. It's challenging!
steamcommunity.com/games/227549...
September 22, 2025 at 6:48 PM
Bonus Puzzle #10 - DESIGNER'S NOTEBOOK
... which is actually not a puzzle, but a set of 12 new puzzles, most of which require you to design a production line able to build one of two different products using conditional inputs and commands. It's challenging!
steamcommunity.com/games/227549...
... which is actually not a puzzle, but a set of 12 new puzzles, most of which require you to design a production line able to build one of two different products using conditional inputs and commands. It's challenging!
steamcommunity.com/games/227549...
Bonus puzzle #9 - TOY CASH REGISTER
"Get kids started early on understanding the transactional nature of modern life! This toy cash register includes a light-up display and a working cash drawer. It's all about the Yukichis (Benjamins)!"
store.steampowered.com/app/2275490/...
"Get kids started early on understanding the transactional nature of modern life! This toy cash register includes a light-up display and a working cash drawer. It's all about the Yukichis (Benjamins)!"
store.steampowered.com/app/2275490/...
September 15, 2025 at 6:42 PM
Bonus puzzle #9 - TOY CASH REGISTER
"Get kids started early on understanding the transactional nature of modern life! This toy cash register includes a light-up display and a working cash drawer. It's all about the Yukichis (Benjamins)!"
store.steampowered.com/app/2275490/...
"Get kids started early on understanding the transactional nature of modern life! This toy cash register includes a light-up display and a working cash drawer. It's all about the Yukichis (Benjamins)!"
store.steampowered.com/app/2275490/...
Bonus puzzle #8 - SLOT CAR TRACK
"Even though it was clear by the late 80s that video game racing would gain popularity over the old hobby of slot cars, someone at Matsuzawa had enough of a soft spot for it to approve the release of this track."
store.steampowered.com/app/2275490/...
"Even though it was clear by the late 80s that video game racing would gain popularity over the old hobby of slot cars, someone at Matsuzawa had enough of a soft spot for it to approve the release of this track."
store.steampowered.com/app/2275490/...
September 8, 2025 at 6:52 PM
Bonus puzzle #8 - SLOT CAR TRACK
"Even though it was clear by the late 80s that video game racing would gain popularity over the old hobby of slot cars, someone at Matsuzawa had enough of a soft spot for it to approve the release of this track."
store.steampowered.com/app/2275490/...
"Even though it was clear by the late 80s that video game racing would gain popularity over the old hobby of slot cars, someone at Matsuzawa had enough of a soft spot for it to approve the release of this track."
store.steampowered.com/app/2275490/...
Bonus puzzle #7 - DOLLHOUSE KITCHEN
"This kids' kitchen playset originally included real heating elements along with realistic flame and smoke effects, but those features were nixed before it went into production due to safety concerns."
store.steampowered.com/app/2275490/...
"This kids' kitchen playset originally included real heating elements along with realistic flame and smoke effects, but those features were nixed before it went into production due to safety concerns."
store.steampowered.com/app/2275490/...
September 1, 2025 at 8:26 PM
Bonus puzzle #7 - DOLLHOUSE KITCHEN
"This kids' kitchen playset originally included real heating elements along with realistic flame and smoke effects, but those features were nixed before it went into production due to safety concerns."
store.steampowered.com/app/2275490/...
"This kids' kitchen playset originally included real heating elements along with realistic flame and smoke effects, but those features were nixed before it went into production due to safety concerns."
store.steampowered.com/app/2275490/...
Our AMA on Reddit is live right now! Join us to talk about our games, Coincidence, Zachtronics, game design, pachinko, or anything else you want an answer to!
www.reddit.com/r/AMA/commen...
www.reddit.com/r/AMA/commen...
From the AMA community on Reddit: I'm Zach Barth, a game developer at Coincidence. We just released Kaizen: A Factory Story, but before that we made a bunch of games at Zachtronics. AMA!
Explore this post and more from the AMA community
www.reddit.com
August 29, 2025 at 6:04 PM
Our AMA on Reddit is live right now! Join us to talk about our games, Coincidence, Zachtronics, game design, pachinko, or anything else you want an answer to!
www.reddit.com/r/AMA/commen...
www.reddit.com/r/AMA/commen...
We're going to be doing an AMA tomorrow (08/29/25) on Reddit (/r/IAMA) starting at 10AM PT. Join us to talk about Kaizen: A Factory Story, Coincidence, or anything else we've worked on here or at Zachtronics!
August 28, 2025 at 10:34 PM
We're going to be doing an AMA tomorrow (08/29/25) on Reddit (/r/IAMA) starting at 10AM PT. Join us to talk about Kaizen: A Factory Story, Coincidence, or anything else we've worked on here or at Zachtronics!
Reposted by Coincidence
Draknek & Friends Official Podcast Episode 35 featuring Zach Barth from @coincidence.games is out now! Topics include the development of Kaizen, making accessible Zach-likes, and systems design.
draknek.org/podcast
draknek.org/podcast
Draknek & Friends Official Podcast
Join Alan and Syrenne from Draknek & Friends as they talk to developers of some of their favorite puzzle games, shedding light onto how games get made and th...
draknek.org
August 28, 2025 at 4:06 PM
Draknek & Friends Official Podcast Episode 35 featuring Zach Barth from @coincidence.games is out now! Topics include the development of Kaizen, making accessible Zach-likes, and systems design.
draknek.org/podcast
draknek.org/podcast
Bonus puzzle #6 - BOOMBOX
"Bring the beats with Matsuzawa's biggest boom box to date! The whopping twelve D batteries it requires will definitely set you back some cash, but the volume that enables will guarantee you never lose another boom box battle!"
store.steampowered.com/app/2275490/...
"Bring the beats with Matsuzawa's biggest boom box to date! The whopping twelve D batteries it requires will definitely set you back some cash, but the volume that enables will guarantee you never lose another boom box battle!"
store.steampowered.com/app/2275490/...
August 25, 2025 at 8:43 PM
Bonus puzzle #6 - BOOMBOX
"Bring the beats with Matsuzawa's biggest boom box to date! The whopping twelve D batteries it requires will definitely set you back some cash, but the volume that enables will guarantee you never lose another boom box battle!"
store.steampowered.com/app/2275490/...
"Bring the beats with Matsuzawa's biggest boom box to date! The whopping twelve D batteries it requires will definitely set you back some cash, but the volume that enables will guarantee you never lose another boom box battle!"
store.steampowered.com/app/2275490/...
Bonus puzzle #5 - CHESS COMPUTER
"The Matsuzawa ENDGAME was an entry-level chess computer intended to introduce children and neophytes to the world of chess. But sales faced headwinds because nobody could beat it, even when set to the lowest difficulty."
store.steampowered.com/app/2275490/...
"The Matsuzawa ENDGAME was an entry-level chess computer intended to introduce children and neophytes to the world of chess. But sales faced headwinds because nobody could beat it, even when set to the lowest difficulty."
store.steampowered.com/app/2275490/...
August 18, 2025 at 8:29 PM
Bonus puzzle #5 - CHESS COMPUTER
"The Matsuzawa ENDGAME was an entry-level chess computer intended to introduce children and neophytes to the world of chess. But sales faced headwinds because nobody could beat it, even when set to the lowest difficulty."
store.steampowered.com/app/2275490/...
"The Matsuzawa ENDGAME was an entry-level chess computer intended to introduce children and neophytes to the world of chess. But sales faced headwinds because nobody could beat it, even when set to the lowest difficulty."
store.steampowered.com/app/2275490/...
Reposted by Coincidence
We can neither confirm nor deny the appearance of the Matsuzawa Grendel MaxTar on the Kaizen OST.
Bonus puzzle #4 - ELECTRIC GUITAR!
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
August 12, 2025 at 9:20 PM
We can neither confirm nor deny the appearance of the Matsuzawa Grendel MaxTar on the Kaizen OST.
Bonus puzzle #4 - ELECTRIC GUITAR!
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
August 12, 2025 at 6:04 PM
Bonus puzzle #4 - ELECTRIC GUITAR!
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
"Combining the best of analog and digital into a single instrument, the Matsuzawa Grendel MaxTar included a built-in amplifier and effects unit. Plans to add oscillators and a step sequencer were shelved, however."
store.steampowered.com/app/2275490/...
Reposted by Coincidence
The original soundtrack to Kaizen: A Factory Story, by me, Sam Kulchin, and @drewmm.com is out now on Bandcamp and coming to streaming services soon! coincidencegames.bandcamp.com/album/kaizen...
Kaizen: A Factory Story Original Soundtrack, by Matthew S. Burns, Sam Kulchin, Drew Messinger-Michaels
20 track album
coincidencegames.bandcamp.com
August 4, 2025 at 6:40 PM
The original soundtrack to Kaizen: A Factory Story, by me, Sam Kulchin, and @drewmm.com is out now on Bandcamp and coming to streaming services soon! coincidencegames.bandcamp.com/album/kaizen...
Bonus puzzle #3 - ARCHERY TARGET!
"After an unsuccessful foray into developing new building materials, the Matsuzawa team realized its wood fiber composite was perfect for use in archery targets and dart boards. Thus, the sporting goods division was born!"
store.steampowered.com/app/2275490/...
"After an unsuccessful foray into developing new building materials, the Matsuzawa team realized its wood fiber composite was perfect for use in archery targets and dart boards. Thus, the sporting goods division was born!"
store.steampowered.com/app/2275490/...
August 4, 2025 at 6:17 PM
Bonus puzzle #3 - ARCHERY TARGET!
"After an unsuccessful foray into developing new building materials, the Matsuzawa team realized its wood fiber composite was perfect for use in archery targets and dart boards. Thus, the sporting goods division was born!"
store.steampowered.com/app/2275490/...
"After an unsuccessful foray into developing new building materials, the Matsuzawa team realized its wood fiber composite was perfect for use in archery targets and dart boards. Thus, the sporting goods division was born!"
store.steampowered.com/app/2275490/...
Bonus puzzle #2 - SYNTHESIZER!
"The battery-powered Matsuzawa Grendel let keyboard players jam with the music anywhere, anytime. It was praised for its eight realistic built-in voices and four-note polyphony, but some criticized the small number of keys."
store.steampowered.com/app/2275490/...
"The battery-powered Matsuzawa Grendel let keyboard players jam with the music anywhere, anytime. It was praised for its eight realistic built-in voices and four-note polyphony, but some criticized the small number of keys."
store.steampowered.com/app/2275490/...
July 29, 2025 at 12:40 AM
Bonus puzzle #2 - SYNTHESIZER!
"The battery-powered Matsuzawa Grendel let keyboard players jam with the music anywhere, anytime. It was praised for its eight realistic built-in voices and four-note polyphony, but some criticized the small number of keys."
store.steampowered.com/app/2275490/...
"The battery-powered Matsuzawa Grendel let keyboard players jam with the music anywhere, anytime. It was praised for its eight realistic built-in voices and four-note polyphony, but some criticized the small number of keys."
store.steampowered.com/app/2275490/...
Weekly bonus puzzle #1 - SUPER DEFENDER BOT!
"Taking note of Defender Bot's popularity, Matsuzawa released the Super Defender Bot in 1987. It added shoulder-mounted cannons and button-activated sound effects, testing the patience of parents across the world!"
store.steampowered.com/app/2275490/...
"Taking note of Defender Bot's popularity, Matsuzawa released the Super Defender Bot in 1987. It added shoulder-mounted cannons and button-activated sound effects, testing the patience of parents across the world!"
store.steampowered.com/app/2275490/...
July 21, 2025 at 10:31 PM
Weekly bonus puzzle #1 - SUPER DEFENDER BOT!
"Taking note of Defender Bot's popularity, Matsuzawa released the Super Defender Bot in 1987. It added shoulder-mounted cannons and button-activated sound effects, testing the patience of parents across the world!"
store.steampowered.com/app/2275490/...
"Taking note of Defender Bot's popularity, Matsuzawa released the Super Defender Bot in 1987. It added shoulder-mounted cannons and button-activated sound effects, testing the patience of parents across the world!"
store.steampowered.com/app/2275490/...
Reposted by Coincidence
I had the privilege of leading the localization team on this project!
David's story resonated so deeply with my own and I'm glad I got to be a part of bringing it to other languages, especially Japanese. Our team worked particularly hard to make sure the dialogue was period-accurate. Go play it!
David's story resonated so deeply with my own and I'm glad I got to be a part of bringing it to other languages, especially Japanese. Our team worked particularly hard to make sure the dialogue was period-accurate. Go play it!
Kaizen: A Factory Story is now available on Steam!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Save 10% on Kaizen: A Factory Story on Steam
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, camcord...
store.steampowered.com
July 15, 2025 at 1:22 AM
I had the privilege of leading the localization team on this project!
David's story resonated so deeply with my own and I'm glad I got to be a part of bringing it to other languages, especially Japanese. Our team worked particularly hard to make sure the dialogue was period-accurate. Go play it!
David's story resonated so deeply with my own and I'm glad I got to be a part of bringing it to other languages, especially Japanese. Our team worked particularly hard to make sure the dialogue was period-accurate. Go play it!
Reposted by Coincidence
🎮🕹️ There's a new (almost) #Zachtronics game out! It's "Kaizen: A Factory Story", the latest from @coincidence.games.
It's the puzzle gameplay you know and love tied up in a great 1980s Japan setting. I had a blast with it!
Check out my full review:
david.reviews/articles/kai...
It's the puzzle gameplay you know and love tied up in a great 1980s Japan setting. I had a blast with it!
Check out my full review:
david.reviews/articles/kai...
"Kaizen: A Factory Story" is a excellent Zach-like from the devs who know the genre best
Familiar Zachtronics-style gameplay feels great in 1980s Japan.
david.reviews
July 14, 2025 at 5:14 PM
🎮🕹️ There's a new (almost) #Zachtronics game out! It's "Kaizen: A Factory Story", the latest from @coincidence.games.
It's the puzzle gameplay you know and love tied up in a great 1980s Japan setting. I had a blast with it!
Check out my full review:
david.reviews/articles/kai...
It's the puzzle gameplay you know and love tied up in a great 1980s Japan setting. I had a blast with it!
Check out my full review:
david.reviews/articles/kai...
Kaizen: A Factory Story is now available on Steam!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Save 10% on Kaizen: A Factory Story on Steam
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, camcord...
store.steampowered.com
July 14, 2025 at 5:15 PM
Kaizen: A Factory Story is now available on Steam!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Build assembly lines to make toys, electronics, appliances, and more in 1980s Japan. Impress your bosses with your innovative solutions.
store.steampowered.com/app/2275490/...
Look out for weekly bonus puzzles coming your way soon!
Reposted by Coincidence
It's the last day to get points for hm_gamejam_v2: Kaizen! Deadline Mon, July 14, 18:00 UTC. Make, Play, Vote! Wishlist Kaizen: A Factory Story on Steam! store.steampowered.com/app/2275490/... #GameJam #Kaizen
July 14, 2025 at 12:49 AM
It's the last day to get points for hm_gamejam_v2: Kaizen! Deadline Mon, July 14, 18:00 UTC. Make, Play, Vote! Wishlist Kaizen: A Factory Story on Steam! store.steampowered.com/app/2275490/... #GameJam #Kaizen
Reposted by Coincidence
come make some games, memes, experiences, sick ascii art, or WHATEVER
The theme is Kaizen, to hype the launch of Kaizen: A Factory Story (out monday) from our friends at @coincidence.games !!
wishlist Kaizen: A Factory Story here store.steampowered.com/app/2275490/...
The theme is Kaizen, to hype the launch of Kaizen: A Factory Story (out monday) from our friends at @coincidence.games !!
wishlist Kaizen: A Factory Story here store.steampowered.com/app/2275490/...
July 11, 2025 at 6:50 PM
come make some games, memes, experiences, sick ascii art, or WHATEVER
The theme is Kaizen, to hype the launch of Kaizen: A Factory Story (out monday) from our friends at @coincidence.games !!
wishlist Kaizen: A Factory Story here store.steampowered.com/app/2275490/...
The theme is Kaizen, to hype the launch of Kaizen: A Factory Story (out monday) from our friends at @coincidence.games !!
wishlist Kaizen: A Factory Story here store.steampowered.com/app/2275490/...
What's revealed when you scratch off a game card in the Zach Attack! Scratch 'n Solve Puzzle Pack? I would say "clues for strategizing and logical deduction" but the marketing people assure me that "fun!" is the correct answer.
Just 24 hours left to go!
www.kickstarter.com/projects/zac...
Just 24 hours left to go!
www.kickstarter.com/projects/zac...
The Zach Attack! Scratch 'n Solve Puzzle Pack
Six different scratch-off games that combine logic puzzles with push-your-luck mechanics.
www.kickstarter.com
June 27, 2025 at 6:03 PM
What's revealed when you scratch off a game card in the Zach Attack! Scratch 'n Solve Puzzle Pack? I would say "clues for strategizing and logical deduction" but the marketing people assure me that "fun!" is the correct answer.
Just 24 hours left to go!
www.kickstarter.com/projects/zac...
Just 24 hours left to go!
www.kickstarter.com/projects/zac...
Only TWO WEEKS left in the Kickstarter for the Zach Attack! Scratch 'n Solve Puzzle Pack, the latest physical game from Coincidence.
www.kickstarter.com/projects/zac...
My goal with this project was to fit as much game design as possible into a scratch-off card. This was a challenge! (1/2)
www.kickstarter.com/projects/zac...
My goal with this project was to fit as much game design as possible into a scratch-off card. This was a challenge! (1/2)
The Zach Attack! Scratch 'n Solve Puzzle Pack
Six different scratch-off games that combine logic puzzles with push-your-luck mechanics.
www.kickstarter.com
June 13, 2025 at 11:13 PM
Only TWO WEEKS left in the Kickstarter for the Zach Attack! Scratch 'n Solve Puzzle Pack, the latest physical game from Coincidence.
www.kickstarter.com/projects/zac...
My goal with this project was to fit as much game design as possible into a scratch-off card. This was a challenge! (1/2)
www.kickstarter.com/projects/zac...
My goal with this project was to fit as much game design as possible into a scratch-off card. This was a challenge! (1/2)
The demo for Kaizen: A Factory Story is now live on Steam!
store.steampowered.com/app/2275490
This is the first demo that I have made for one of our games since... 2011? I've been operating under the assumption that Bulletstorm killed the PC game demo, but apparently that's not true anymore.
store.steampowered.com/app/2275490
This is the first demo that I have made for one of our games since... 2011? I've been operating under the assumption that Bulletstorm killed the PC game demo, but apparently that's not true anymore.
Kaizen: A Factory Story on Steam
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, camcord...
store.steampowered.com
June 9, 2025 at 6:44 PM
The demo for Kaizen: A Factory Story is now live on Steam!
store.steampowered.com/app/2275490
This is the first demo that I have made for one of our games since... 2011? I've been operating under the assumption that Bulletstorm killed the PC game demo, but apparently that's not true anymore.
store.steampowered.com/app/2275490
This is the first demo that I have made for one of our games since... 2011? I've been operating under the assumption that Bulletstorm killed the PC game demo, but apparently that's not true anymore.
Did you catch us at the PC Gaming Show?
In case you missed it, Kaizen: A Factory Story will be launching on July 14th!
We're also releasing a demo, available June 9th (tomorrow!) as part of Steam’s Next Fest.
Check it out and let us know what you think!
www.youtube.com/watch?v=DDuD...
In case you missed it, Kaizen: A Factory Story will be launching on July 14th!
We're also releasing a demo, available June 9th (tomorrow!) as part of Steam’s Next Fest.
Check it out and let us know what you think!
www.youtube.com/watch?v=DDuD...
Kaizen: A Factory Story release date trailer - PC Gaming Show 2025
YouTube video by PC Gamer
www.youtube.com
June 8, 2025 at 7:58 PM
Did you catch us at the PC Gaming Show?
In case you missed it, Kaizen: A Factory Story will be launching on July 14th!
We're also releasing a demo, available June 9th (tomorrow!) as part of Steam’s Next Fest.
Check it out and let us know what you think!
www.youtube.com/watch?v=DDuD...
In case you missed it, Kaizen: A Factory Story will be launching on July 14th!
We're also releasing a demo, available June 9th (tomorrow!) as part of Steam’s Next Fest.
Check it out and let us know what you think!
www.youtube.com/watch?v=DDuD...