
- Indie
- Simulation
Game
CHR$(143)
Discover the physics of a mysterious 2D tile-based universe, including ballistics, fluid mechanics, thermodynamics, chemical and nuclear reactions. Use automation bricks, build structures, machines, vehicles, produce power, solve puzzles, pierce the fog and defeat Chrs!
A rich and challenging physics-based puzzle /logic /construction /programming game! Master ballistics, fluid mechanics, thermodynamics, chemical and nuclear reactions, use automation bricks, build structures, machines, vehicles, produce power, solve puzzles, pierce the fog and defeat CHR$!
About CHR$(143)
- Released
- August 2021
- Developer
- NJean
- Engine
- Godot
- Platforms
- Linux · PC (Microsoft Windows)
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsSmoother learning curve: access the heart of CHR$(143)!Historical difficulty of CHR$(143) no longer stands in the way of a deeper discovery of the game Opt for the easier difficulty level, with a smoother learning curve, and go further in the game! Version 1.30 is designed to make the game more accessible with 2 major additions: the player can opt anytime for the easier difficulty level (currently available for most of the first 22 levels, as well...
- Community AnnouncementsCHR$(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 level 11, but if you have solved it already and don't want to solve it again, here are a few hints: the 2 historical strategies ("upward" and "downward") are now completed by "leftward" and "rightward...
- Community AnnouncementsNew 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?
- Community AnnouncementsCHR$(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 number of levels they have solved, and the sum of their best time in each level... NB: As this leaderboard has been introduced in v1.27.12, former veterans must launch at least one level to be incl...
- Community AnnouncementsUpdate notes for 1.27.10fixed 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 immediately restart a level addition of a system for resetting the end of level 5 in the event of an error (without having to start all over again).
- Community AnnouncementsNew Workshop Level "Water, water"This is an original workshop level with a very simple goal: You have an infinite source of water and you need to pour as much as possible into the big pipe in one minute! That's all... Design the device of your choice, whether it is automatic or manual, whether it uses CPUs or not... and maximize that amount. By checking the worldwide statistics sharing in the setup, you can compare your result...
- Mods indexed
- 28
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
Most downloaded
Measured from the source's own counts, summed across every release.
- Mini MazesA very tricky logic puzzle for you. Can you find the unique path that satisfies all the clues?202 downloads
- Yet Another Tank...Automate vehicles with discrete logic to fill a tank.195 downloads
- The great escape (reversed)What would have happened if the Level 44 Rescue Team had abandoned the mission? Go back to your cell and see... Warning: this level is only for players who have already solved the standard level 44... (based on an original idea by Garzahd :-)116 downloads
- Sabotage with careWORRYING NEWS: our enemies have developed a new technology that could give them a decisive advantage: we need to know more! Go deep into their secret factory and see what's going on. Your brand new DETONATOR will help you find your way...95 downloads
- Towers of HanoiThis is a demo of the famous Towers of Hanoi problem. Open-source, feel free to analyze and improve the CPU code.80 downloads
- Core DumpExpertise in fast logic would be a plus... (probably best after level 34)77 downloads
- Christmas Puzzle* * * Special Christmas puzzle * * * Build an automatic gift distribution system! Drew and Brett are counting on your ingenuity... (you may also try "Christmas Puzzle II", a slightly more difficult version)56 downloads
- Level 1 (revisited)You enjoyed Level 1... Why not enjoy level 1 (CPU-)revisited? [2023-05-06 update: shortest time wins!]49 downloads
- Pump up the volume...Automate things(?) to pump oil from one tank to another...45 downloads
- Dire strait...Official Epilogue of Level 44 Stuck in the wreck of a sinking submarine... who could get us out of there?40 downloads
- Fire Safety ExerciseJust a little level I made to play around with CPU features. Less of an actual CHR$ puzzle and more of an adventure game. See if you can find all the contextual text notices and escape your house!39 downloads
- Heist of the CenturyBreak into the vault, collect the diamonds and escape underwater... A mixture of levels 39 and 44, which you'd better have completed before!38 downloads
- Level 1 (by night)Design an automated vehicle to find your way in the fog... You are not dreaming, this is a real CPU nightmare! [2021-10-04 update: optimize the time!]37 downloads
- NekoBaron - Miner TrainingWe need you to dig us up some diamonds and move them to a safe spot, union says we cant dig by hand so you will need to build a drilling machine. Just be careful no to drill though the diamonds!36 downloads
- pmuD eroCWas Core Dump too simple for you? Try pmuD eroC! A level strictly based on the use of elementary logic gates, with a goal that is easy to explain... Demonstrate your skills as a logic circuit designer!36 downloads
- Christmas Puzzle II* * * Special Christmas puzzle * * * Build an ADVANCED automatic gift distribution system! Drew and Paris are counting on your ingenuity... (same as "Christmas Puzzle" but a little more difficult ;^)35 downloads
- Tunnel in a sandboxAn impossible mission? No, just a level that uses the limits of the physics engine... A challenge for the experts.34 downloads
- NekoBaron - Bank JobGet into the bank and steal the container of diamonds from inside! A easy level that will just require you to code you own code breaker to unlock the safe.32 downloads
- NekoBaron - Bin to DecLearn how to turn binary into a decimal value with a 1bit and 2 bit example, make your own 3bit converter to win the level!32 downloads
- NekoBaron - Rocket FuelWe need you to fuel up this rocket with some hydrogen, and we want it filled not detonated so do be careful.31 downloads
- Extreme refinementBuild a sophisticated plant that turns coal into power... by burning oil! Unfortunately, you probably need to have already solved level 51 or, even better, 61 before tackling this devilishness. Dedicated to NeverOddOrEven ;^)28 downloads
- Sequencer SandboxA music sequencer that you can build in! Editing is unlocked, so feel free to duplicate it and look at the CPU code.21 downloads
- Water, water!Just pour as much water as you can in the big pipe! You can use CPUs... or not. (best served with Worldwide Statistics)21 downloads
- Shmup!A 100% CPU level in which you (simply) have to hit as many moving targets as possible...21 downloads
Browse all 28 CHR$(143) mods Sortable by downloads, rating and date.
More simulation games see all
Why CHR$(143) mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host CHR$(143) mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.






