
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$!
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0/day in the week to Aug 4 → 0.14/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Genres
Engagement
Reviews
Themes across 42 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
オッサンなので、グラフィックやサウンドに”懐かしさ”を覚える。 コンピューターゲームの歴史や基礎みたいなものも感じられるので履修して良かった 私のようにプログラミングに馴染みが無い人は、ステージ50辺りから苦労するかも。
I built myself a bathyscaphe so small I did not leave any room for air so I suffocated. This game is just BRILLIANT! Do not be deceived by the graphics. It has a steep (somewhat rollercoastery) learning curve - but you can skip levels and usually that helps to understand what were you meant to do in a previous level xD Another minus is sometimes very small room for error in certain puzzles and inability to restart the level with your buildings intact (you can save the layout but you have to build everything from scratch) So 10 points - 2 = 8/10! I LOVE it!
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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, French, German, Spanish - Spain, Japanese, Portuguese - Portugal, Russian, Simplified Chinese, Italian, Greek, Polish, Romanian +4 more
Hours played at review time, across 42 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
This is one of the most interesting puzzle games I've played in a while. It feels like the logical next step from Zachtronics' games, in that you're given a set of mechanics to engineer solutions to a problem. Here, though, it's far more open-ended, with a whole physics sandbox to exploit. I haven't even gotten to the later mechanics and I'm having a great time! CHR$(143) is a little-known game - as far as I can tell, only about 2000 people have bought it. As criminal as this is, I have to say I'm enjoying the utter lack of easily-available solutions online - I'm pretty weak-willed and the payoff for solving these puzzles is so much better when you're honest from start to finish. And of course, many thanks to the developer for keeping the game alive and well. If you enjoyed TIS-100, or Opus Magnum, or Factorio, don't miss this one! It'll scratch that itch. I've only beat the first 22 (of 72) levels, so if my hours played is a lot higher than at the time of this review, consider that a further recommendation :3
IIII
who can tell me how to play l18?
Really challenging puzzles with rewarding results. Would recommend only to people with lots of time to kill
It was 50/50 for me. It has interesting mechanics and potential, but it also has horrible ergonomics, cumbersome digging/building, poorly introduced mechanics, and the overheating/blackout mechanic is just very annoying to deal with.
I like the graphics, let me remember the old days of technology (MS-DOS) Also, each level comes with nice hints to learn how to pass it GREAT GAME DESIGN (Some levels are difficult at the start, so be ready!)
If the graphics aren't a turn off, this is probably the game for you. It's a pretty good puzzler with diverse mechanics. It kept me engaged with new content for the 90 hours it took to complete the main game.
J'aime
Selling now
See how fast this game is selling right now — estimated copies and revenue per day from recent review growth.
Players by region
Where this game's players are, estimated from review languages.
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