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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. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-12.
What reviewers agree on
44 of the 67 reviews raise this.
“What a fantastic puzzle game. Beautifully polished and thoroughly challenging. Many bonus points for Apple Silicon support.”
19 of the 67 reviews raise this.
“awesome game, really makes you think. Some familiarity with programming or assembly languages might be helpful”
“Brain hurt.”
3 of the 67 reviews raise this.
“What a fantastic puzzle game. Beautifully polished and thoroughly challenging. Many bonus points for Apple Silicon support.”
3 of the 67 reviews raise this.
“Really nice pseudo-assembly engineering like game, can get complex in certain areas so the manual becomes really helpful when your lost. would recommend!”
6 of the 67 reviews raise this · 4 of them still recommend the game.
“feels like im doing a j*b”
“nothing pisses me off more in this game than the random a** f*** a** solitaire minigame they chucked in. ive only won the minigame ONCE. WHY IS THERE GENUINELY AN ACHIEVEMENT FOR WINNING 100 SOLITAIRE GAMES?!?!?!?!…”
“Well, it's quite interesting game. I just don't understand why they add cards game there🤣. But the main idea and realization is great. Finally I got some asm in my hands.”
4 of the 67 reviews raise this · 3 of them still recommend the game.
“I've played other coding games, this is incredibly obtuse, and the game aspects are incredibly abrasive.”
Counted across 67 English reviews, sampled to match this game's 94.9% positive rating · as of 2026-05-12
“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 data self-collected from the Steam API · history through 2026-06 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 2026-09-05.
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 (2026-09-10). 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 2026-05-12.
| 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 |
| 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