
In a concrete slab beneath the earth, a lone technician is sent for routine maintenance on a network of supercomputers. Each terminal operates on its own hidden rules, and the only way to escape is to learn how to speak their language. Crack the code, unlock the truth.
Revenue comes from in-game items and microtransactions, which our price-based model doesn't estimate. The player count below is how many people own it, not what they spent.
About
In a concrete slab buried deep beneath the earth, a lone technician is sent for what should be routine maintenance on a network of supercomputers. Run the scripts. Get the job done. And remember, they're just machines.
Terminal Lucidity combines atmospheric horror with cryptic cipher-breaking gameplay. Each terminal operates on its own hidden rules, and the only way to escape is to learn how to speak their language. Learn how each operates individually, and then learn how their rules combine into new outputs.
This game is designed as a self-contained psychological thriller experience, playable to an ending in a single 2 to 4 hour sitting. Each corner of the map has been modelled and each puzzle handcrafted to deliver a challenging yet tight single-player experience.
Keep your notes nearby, as you will have to rely on your own broken memory. Every answer and every command is available from the beginning - you only need to rediscover them.
Not that it matters, as there is no way out.
Genres
Stats
Languages: English
Engagement
Reviews
Themes across 59 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
é um CRIME essse jogo ser grátis, comprei o pacote de suporte ao dev com gosto, definitivamente um jogo de puzzle bem construído e com ideias bem interessantes. descobrir as regras de cada terminal e quebrar a cabeça decifrando cada etapa das conexões entre as mensagens foi definitivamente bastante divertido e ouvir a próxima porta abrindo era sempre extremamente satisfatório. se você gosta um pouquinho de criptografia, cifras, vale muito a pena.
Terminal Lucidity being free is absurd. I liked the game so much that I bought the Game Manual just so I wouldn’t have to get something like this for free. It’s a very difficult game, especially if you’re not used to this kind of puzzle, and that claim that it takes 2 to 4 hours is complete nonsense. If you already know exactly what to do, sure, but going in blind, this can easily turn into 12 hours or much more. The game itself already warns you that you’ll need to remember an absurd number of names, passwords, commands, and clues, and the guide literally recommends keeping a notebook next to you while playing. Each computer works differently, and you have to figure out how they process what they receive in order to move forward. Solitaire is a little complicated, but CHAR-0-N was just absolutely insane. At some point, you’re connecting multiple terminals, passing information through each one, and trying to figure out how to make everything come out exactly the way it should. And the worst part is that once you finally understand it, the solution seems obvious. The story is also very good and is scattered across the Memos, the computers, and the messages you find while exploring. Little by little, you discover who the people connected to the Seance Engines are and what happened to them. The Memos are especially important because they contain information you would hardly understand just by following the main path. You find messages from Mikhail, Elizabeth, and several other people, and each set adds another piece to that puzzle. Elizabeth’s story was one of the parts I liked the most. Her messages are really good, and they become heavier and heavier as you understand the context behind them. She talks about trying to save someone, about no longer being able to remember things, and about who she is trying to save. At one point, she can’t even remember who the person is who seems to be so important to her. You piece these messages together little by little and realize just how closely the loss of memory is tied to what is happening to these people. The Seance Engines also take on a completely different meaning once you understand that there are people trapped inside them, losing their memories and becoming increasingly distant from who they used to be. The very concept of Terminal Lucidity is tied to a moment of clarity that can occur shortly before death, and the game uses that idea to build its story. There’s also something deeply ironic about the game not having a save system because the people inside these machines are losing their memories. Even something as simple as playing Solitaire becomes strangely meaningful when the game tells you to do it because “maybe I’d like it.” Memory is everything I have, while these people are slowly losing theirs. The fact that the game quietly ties such an ordinary mechanic to its central theme is both interesting and oddly unsettling. And discovering all of this is so, so satisfying. There’s something incredibly rewarding about noticing a clue, remembering something you saw hours ago, going back to another computer, testing a word, and realizing that it finally makes sense. The game genuinely rewards paying attention. The Memos aren’t there just to fill space: they help piece the story together, and they can also provide important information for solving the puzzles themselves. The part about freeing all of these people is excellent too. After spending so much time understanding who those terminals are and what happened to them, realizing that you can finally put an end to all of it and free them together gives the ending so much more weight. In the first ending, you can only free one of them, but the second part of the game reveals how to find the path that allows you to free the others as well. My recommendation is emphatic: take notes. Read every Memo, talk to the computers in Free Mode, test words, see everything they have to say, and take screenshots or write things down in a notebook. If you find a numbered Memo, it’s even worth trying the numbers before and after it, because they tend to follow a sequence. It may sound excessive, but it’s absolutely worth it. I also have to mention that it took me way too long to realize that I stood for Input and O stood for Output. Once I finally figured that out, my game just flew. I spent ages trying to understand something that was literally written right in front of me. And yes, I caught the Alysa Liu reference, too. I really, really loved Terminal Lucidity, and I’d love to play another game like it. I love this kind of experience where you have to step away from the screen, take notes, look for connections, and feel like a lunatic trying to figure out what the hell is going on. It’s almost like solving a mystery on your own, and when you finally understand something that’s been sitting right in front of you for hours, the feeling is just too good.
Media

Related
Related
Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
This and every other Pro feature is free until October 20, 2026. A free account is all it takes.
Hours played at review time, across 59 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
Didn't finish the game yet, but the atmosphere and intrigue are definitely there. It took me a while to understand how the terminals work conceptually, but after that solving the various puzzles felt engaging. Not sure if it's just my screen/resolution, but sometimes it's a bit hard to read the text on the consoles. I'm not fully sold on the No Saving aspect, and because of this I'd recommend just writing down the answers in case you can't finish the game in one session. It will save hours of your life.
Tricky and fun. Makes your brain hurt. But in a good way
One of the best puzzle/metroidbrainia games I've played. It helps to play with a notebook or excel-sheet open nearby. Great puzzles, not too complicated, evolves nicely and ends with a very satisfying conclusion. If you enjoyed The Talos Principle, Outer Wilds, Lorelei and the Laser Eyes, The Witness etc... this game is worth at least a fair shake.
Очень скучная игра, команда /free очень ограничена в ответах компьютера, если задать ему вопросы напрямую. Головоломки здесь непростые, без руководства, ты сам не разберешься, какую именно команду нужно вводить в декодер для перевода ответа в двоичную систему. Метка "хоррор", как по мне лишняя, здесь нет скримеров, даже атмосфера жути не нагоняет. Если рассматривать игру, как Escape Rooms, то да, неплохая, но это явно не хоррор. 3 ИИ в режиме /free/10
Good, tightly constructed game, the kind you'll want to keep a notepad or spreadsheet handy for. Can be rushed through in a few hours; I ended up spending a while longer looking for Easter eggs (couldn't find any, alas).
incredible game. really fun puzzles, really good atmosphere. and its FREE??!?!?
Solid, atmospheric code-cracking game, even if the start is obtuse and the "true" ending is kind of disappointing. You will end up writing a ton out in a notebook. Liked that each machine had its own personality and quirks that you get to be very familiar with. Lore doesn't really go anywhere - you could put any posters on the walls and they'd have the same relevance.
I found this for free while scrolling around steam and ♥♥♥♥♥♥♥ was i lucky. A puzzle game about coding and decrypting messages where you gotta pass a message through different terminals that will encrypt it so you gotta figure the way to write it so it can be read correctly. This game is VERY HARD but really interesting, with a really cool ambiance! The story is nothing special but still very fitting with the gameplay. Getting the alternate ending was not only mind-blowing but also amazing to see. I really recomend it!!! This was truly a surprise!
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $1M | 7.3K | 94% | $8.99 | |
| $739 | 24 | 71% | $0.99 | |
| — | 0 | — | — | |
| — | 0 | — | — | |
| $0 | 865 | 91% | Free | |
| $164.2K | 999 | 24% | $3.19 |