Steam app 504210 · updated 12 Sep 2026, 19:15 UTC
BUILD CIRCUITS. WRITE CODE. RTFM.
719 hourly samples, with the daily peak drawn over them. Weekends are shaded.
121 months, September 2016 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 436 hourly samples from 13 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
12 days as the curve, each the highest figure that day. Behind it, 283 hourly samples. Each dip is a night. Weekends are shaded.
SHENZHEN I/O was released on 17 Nov, 2016.
| Language | Full audio |
|---|---|
| English | |
| Simplified Chinese |
A blank audio cell means full audio was not marked in the returned language list.
6 achievements in total.
50 developer announcements, Nov 2016 to Oct 2022 · times in UTC
Today's update fixes an issue where the mouse would sometimes be misaligned on Macbooks.
Patch notesBoot up your Z5 Powerlance and dial into Last Call BBS, the last game from Zachtronics! The Barkeep’s loaded up his retro computer with a full set of puzzle games for you to download and play. No need to worry about copy protection, they’re…
krispykremToday's update fixes an issue where the game would fail to start on Macs with the new M1 processor.
Patch notesToday's update fixes the crash handler and histograms. Nothing else should be affected.
Patch notesToday's update adds a few missing Chinese strings and support for Korean characters.
Patch notesToday's update fixes a bug where the game would sometimes fail to detect keyboard input when typing code quickly while the game was running at a low framerate.
Patch notesIt's probably years too late, but we've uploaded the SHENZHEN I/O manual to Lulu so that you can order a professionally printed and bound copy (no binder, though). The quality is pretty good, and at $4.99 plus shipping it's not a bad deal!…
krispykremToday's update improves some error messages for when the game crashes.
krispykremToday's update fixes a bug that caused histograms to not load for players who were subscribed to a large number of Workshop puzzles.
krispykremToday's update fixes a bug that caused histograms to not load for players who were subscribed to a large number of Workshop puzzles.
Patch notesToday's update includes more small tweaks to Chinese text. If you see further updates without explanation they'll be for the same reason.
krispykremToday's update includes more small tweaks to Chinese text. If you see further updates without explanation they'll be for the same reason.
Patch notesToday's update fixes a bug introduced in the previous update that caused disabled instructions to no longer appear faded out. It also tweaks a few Chinese strings, with more changes inbound in the next few days.
krispykremToday's update fixes a bug introduced in the previous update that caused disabled instructions to no longer appear faded out. It also tweaks a few Chinese strings, with more changes inbound in the next few days.
Patch notesToday’s update adds a long-awaited “enhanced realism” mode to SHENZHEN I/O. This optional mode may increase the difficulty for some players, but we think the corresponding increase in authenticity is worth it! To enable “enhanced realism”…
krispykremToday’s update adds a long-awaited “enhanced realism” mode to SHENZHEN I/O. This optional mode may increase the difficulty for some players, but we think the corresponding increase in authenticity is worth it! To enable “enhanced realism”…
Patch notesToday’s update removes the game’s dependency on the Microsoft Visual C++ 2012 Redistributable. It’s not very exciting for anyone other than me, who will hopefully get fewer support emails about this.
krispykremToday’s update removes the game’s dependency on the Microsoft Visual C++ 2012 Redistributable. It’s not very exciting for anyone other than me, who will hopefully get fewer support emails about this.
Patch notesToday's update improves the text rendering in SHENZHEN I/O. It shouldn't be noticeable, unless you look really closely at the spacing between letters, at which point it should be incredibly satisfying compared to our old text renderer.
krispykremToday's update improves the text rendering in SHENZHEN I/O. It shouldn't be noticeable, unless you look really closely at the spacing between letters, at which point it should be incredibly satisfying compared to our old text renderer.
Patch notesToday's update fixes a crash when opening a custom puzzle or workshop puzzle with an invalid filename character in the puzzle name.
krispykremToday's update fixes a crash when opening a custom puzzle or workshop puzzle with an invalid filename character in the puzzle name.
Patch notesToday's update includes some minor fixes for conceptSPEC. Fixed a bug where adding or removing radios and dials from a custom specification would not be reflected in existing solutions to that puzzle. Fixed a crash when radio data was…
krispykremToday's update includes some minor fixes for conceptSPEC. Fixed a bug where adding or removing radios and dials from a custom specification would not be reflected in existing solutions to that puzzle. Fixed a crash when radio data was…
Patch notesToday's update fixes a bug where custom specifications could not be uploaded to Steam Workshop on Mac and Linux. It also includes a new version of the "aquatic harvesting robot" puzzle, now called the "kelp harvesting robot", which should…
krispykremToday's update fixes a bug where custom specifications could not be uploaded to Steam Workshop on Mac and Linux. It also includes a new version of the "aquatic harvesting robot" puzzle, now called the "kelp harvesting robot", which should…
Patch notesThis update is a quick fix for a bug in how the conceptSPEC board layout were parsed. As a result, you may have to reposition parts you previously placed in solutions for custom or workshop puzzles.
krispykremThis update is a quick fix for a bug in how the conceptSPEC board layout were parsed. As a result, you may have to reposition parts you previously placed in solutions for custom or workshop puzzles.
Patch notesFixing a few bugs caused by this morning's update: Fixed a bug where uploading a puzzle and deleting it from the Steam Workshop would prevent it from being uploaded again. Fixed a bug that caused the contents of the conceptSPEC window to…
krispykremFixing a few bugs caused by this morning's update: Fixed a bug where uploading a puzzle and deleting it from the Steam Workshop would prevent it from being uploaded again. Fixed a bug that caused the contents of the conceptSPEC window to…
Patch notesToday's update adds a new in-game "application" called conceptSPEC that allows you to create your own puzzles and upload them to the Steam Workshop. You'll need to learn a little Lua to design your own puzzles, but fortunately you're all…
krispykremToday's update adds a new in-game "application" called conceptSPEC that allows you to create your own puzzles and upload them to the Steam Workshop. You'll need to learn a little Lua to design your own puzzles, but fortunately you're all…
Patch notesToday's update adds two new achievements and a small tweak to the electronic practice target puzzle's first test run.
krispykremToday's update adds two new achievements and a small tweak to the electronic practice target puzzle's first test run.
Patch notesThe second-to-last puzzle has been reverted to its original, harder form.
krispykremThe second-to-last puzzle has been reverted to its original, harder form.
Patch notesThanks to everyone who provided feedback about the game during Early Access. We wouldn't have made it what it is today without your input!
krispykremThanks to everyone who provided feedback about the game during Early Access. We wouldn't have made it what it is today without your input!
krispykremThis morning's update fixes a few bugs that caused the re-verification tool to get stuck on some solutions. It also changes the second-to-last puzzle in the game to make it a little less tedious.
krispykremThis morning's update fixes a few bugs that caused the re-verification tool to get stuck on some solutions. It also changes the second-to-last puzzle in the game to make it a little less tedious.
Patch notesTonight's update adds a design re-verification tool to the in-game control panel. We've reset the leaderboards and histograms in anticipation of leaving Early Access tomorrow, so please use it to resubmit your scores!
krispykremTonight's update adds a design re-verification tool to the in-game control panel. We've reset the leaderboards and histograms in anticipation of leaving Early Access tomorrow, so please use it to resubmit your scores!
Patch notesChanges include: Fixed a few bugs with non-deterministic behavior in ambiguous XBus situations. Made the new harvester puzzle easier. Made the new status display puzzle harder. Improved the test cases for the new stopwatch puzzle. Improved…
krispykremChanges include: Fixed a few bugs with non-deterministic behavior in ambiguous XBus situations. Made the new harvester puzzle easier. Made the new status display puzzle harder. Improved the test cases for the new stopwatch puzzle. Improved…
Patch notesChanges include: Tweaked the laser tag puzzle to reduce the number of cases and make it a little simpler for new players. Added some missing information to the SushiRobo floor plans. Meowved an input in a late-game puzzle. Fixing a bug…
krispykremChanges include: Tweaked the laser tag puzzle to reduce the number of cases and make it a little simpler for new players. Added some missing information to the SushiRobo floor plans. Meowved an input in a late-game puzzle. Fixing a bug…
Patch notesThis morning's update fixes a few bugs with visualizations, descriptions, and test cases for some of the puzzles in the new campaign. If you see anything else weird, let me know at [email protected]!
krispykremThis morning's update fixes a few bugs with visualizations, descriptions, and test cases for some of the puzzles in the new campaign. If you see anything else weird, let me know at [email protected]!
Patch notesThis update fixes a bug in the pocket oracle puzzle introduced in today's FIRMWARE UPDATE.
krispykremThis update fixes a bug in the pocket oracle puzzle introduced in today's FIRMWARE UPDATE.
Patch notesWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | Shenzhen.exe | windows | ||
| Launch | Shenzhen IO.app/Contents/MacOS/Shenzhen | macos | ||
| Launch | Shenzhen | linux |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
gameinstall | {64BitSteamID} | save.dat |
gameinstall | {64BitSteamID}/custom_screens | * |
gameinstall | {64BitSteamID} | *.txt |
gameinstall | {64BitSteamID}/custom_puzzles | * |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG