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CHR$(143)
A rich and challenging physics-based puzzle /logic /construction /programming game! Master ballistics, fluid mechanics, thermodynamics, chemical and nuclear reactions, use automation bricks, build structures, machines, vehicles, produce power, solve puzzles, pierce the fog and defeat CHR$!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.
“素晴らしい”
— a player, Steam review · 40 hrs played“Absolutely amazing puzzle game with incredibly well designed , engaging, levels that can get quite challenging but in all the right ways. You can feel the love that went into making the game while playing and it deserves much more attention. If you got to the point of reading…”
— a player, Steam review · 49 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-28.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Smoother learning curve: access the heart of CHR$(143)!
Historical difficulty of CHR$(143) no longer stands in the way of a deeper discovery of the game Opt for the easier difficulty level , with a smoother learning curve, and go further in the game ! Vers
CHR$(143) version 1.28: new and improved building strategies!
Version 1.28 has been released :-) This version introduces a fun new feature (which has been much requested...) Four new building strategies have been introduced. These are explained at the end of lev
New Workshop Level "Shmup!"
This is an original workshop level with a very simple goal: program your CPU to hit as many targets as possible... Easy? Yes, but they move... and fast... Will your program be faster than the targets?
CHR$(143) players leaderboard!
Because all players who surpass level 22 deserve to be honored worldwide, they now appear in a Steam leaderboard that assign them an overall score according to the highest level they have solved, the
Update notes for 1.27.10
fixed a critical bug (game not working for Windows users with non-ASCII usernames...) additional polishing in the first levels to avoid scaring off new players: information on the use of CTRL + to imm
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-28.
| Genres | Indie, Simulation |
| Player tags | Automation · Building · Physics · Puzzle · Programming · Logic · 2D · Pixel Graphics · Retro · 1980s · Crafting · Simulation (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Workshop · Steam Cloud · Stats · Steam Leaderboards · Includes level editor · Family Sharing |
| Languages | English, French, German, Spanish - Spain, Japanese, Portuguese - Portugal, Russian, Simplified Chinese, Italian, Greek, Polish, Romanian, Turkish, Ukrainian, Dutch, Korean |
| Achievements | 8 |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system Memory: 4 GB RAM