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SHENZHEN I/O
BUILD CIRCUITS. WRITE CODE. RTFM.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
“I bought this game to relax after work and somehow ended up with a second, unpaid job writing assembly for fake microcontrollers at midnight. The feeling when a stubborn puzzle finally clicks is genuinely one of the best in gaming, though I've also spent an embarrassing number…”
— a player, Steam review · 10 hrs played“Ah yes, the weekend, the perfect time for a job.”
— a player, Steam review · 20 hrs played“As a programmer, I’ve realized how much assembly language is simplified in certain contexts, yet how incredibly challenging it remains due to hardware-level constraints. The limitations—like restricted lines of code and limited data buses force a unique kind of optimization. I…”
— a player, Steam review · 58 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-11 12:37 UTC · history via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
UPDATE: Fix for mouse alignment bug on Mac
Today's update fixes an issue where the mouse would sometimes be misaligned on Macbooks.
Last Call BBS - The last game by Zachtronics!
Boot 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
UPDATE: Fixing an issue with M1 Macs
Today's update fixes an issue where the game would fail to start on Macs with the new M1 processor.
UPDATE: Fixing the crash handler and histograms
Today's update fixes the crash handler and histograms. Nothing else should be affected.
UPDATE: Minor translation items
Today's update adds a few missing Chinese strings and support for Korean characters.
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Indie, Simulation |
| Player tags | Programming · Automation · Puzzle · Logic · Simulation · Difficult · Indie · Education · Singleplayer · Sandbox · Building · Great Soundtrack (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Workshop · Steam Cloud · Steam Leaderboards · Includes level editor · Family Sharing |
| Languages | English, Simplified Chinese |
| Achievements | 6 |
| Estimated owners | 200,000 – 500,000 (SteamSpy) |
| Official site | http://www.zachtronics.com/shenzhen-io/ |
Minimum system requirements (PC)
Minimum: OS *: Windows Vista / 7 / 8 / 10 Processor: 2.0 GHz Memory: 4 GB RAM Graphics: 1366 x 768 DirectX: Version 11 Storage: 450 MB available space