CERT is an explorable puzzle book. Discover a surreal, dreamlike world filled with classic deduction-based paper puzzles!

Made in 48 hours for Ludum Dare Compo 54.

Awards:

How to play:

  • If you're playing on itch.io:
    • Use the embedded pdf.js viewer above.
    • The "pen" icon lets you draw on the document. Once you've drawn something you can drag it around the page, which is useful for placing things on grids.
  • If you’re playing using a downloaded file:
    • Download the "PDF (Facing Pages)” link.
    • For the best experience, open the PDF in a viewer that lets you draw and scribble on the document.
    • If you can’t do that, I recommend using a pencil and paper to draw out the puzzles and make notes.
  • If you’re printing the book on a home printer:
    • Download the “PDF (Facing Pages)” link.
    • These double pages are designed to print on A5 sheets.
    • If you only have A4 paper you can either scale them up or print two-to-a-page (if you do the latter I recommend cutting the sheets in half to avoid accidental spoilers).
  • If you’re printing the book through a printing service:
    • Download the “PDF (Single Pages)” link.
    • This document is intended to be printed as an A6 booklet.
    • Bleed margins are not included.

Updated 25 days ago
StatusReleased
PlatformsHTML5
Rating
Rated 4.9 out of 5 stars
(14 total ratings)
Authortjm
GenrePuzzle, Adventure
Tagsadventure-game-book, Ludum Dare 54
Average sessionAbout a half-hour
LanguagesEnglish
AccessibilityColor-blind friendly, High-contrast
LinksLudum Dare

Download

Download
PDF (Facing Pages) 4 MB
Version 2 Oct 02, 2023
Download
PDF (Single Pages) 4 MB
Version 2 Oct 02, 2023

Comments

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(+1)

Thank you. I really enjoyed it. I give it a 5 out of 5 trigons :P

(+1)

This game reminds me of those "Choose your own adventure" games.

It was fun, and i felt like the difficulty/learning curve was perfect!


I also like the Portal easter egg!

(+3)

such a delightful and fun premise, i wish there were more puzzle books like this.

(+1)

Oh, this is great.

(+1)

That was great! 

I'd love to play another puzzle adventure like this, are there any that inspired you or that you'd recommend?

(1 edit) (+2)

Thanks! As far as I know mine is the first puzzle book to combine modern puzzles with exploration/adventure book gameplay - that’s why I wanted to try it!

For a similar style of “puzzle books with very light story” I can recommend Blaž Urban Gracar‘s “Lok” and “Abdec” books, both of which were definitely influences on this, but they don't have much of an adventure element.

(+1)

ENDING SPOILERS BELOW


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Thanks for the suggestions! 

To give you more feedback: The branching paths and the "meta" layer of going back to find 'the space between' were fantastic ideas. These puzzles remind me of playing the game 'The Witness'

I completed it the recommended (?) way, and I'm glad I didn't find the second path (15 > 28) to the ending which would skip a puzzle or two. I wonder if a 3rd path could be created from using the unused letters from all of the puzzles combined. 

I wish I was more careful when checking my answers in the dictionary, as I spoiled at least one answer by seeing a future word in my peripheral. The word descriptions were great BTW. 

I felt one word was unintuitive (finis) - every other answer created a commonly known word (except gae but there was an alternative). Overall, would highly recommend. 

(1 edit)

Maybe spoilers below?

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I agree with you about FINIS being unintuitive. I Thought it was trying to say FINISH, and that I somehow missed the H.

However, I interpretted GAE as an alternate spelling of gay. I don't know what the definition of it is referring to though.

Also, since you mentioned "The Witness", you might also like "The Looker". It's not as long, but it's a fun parody of "The Witness", with a similar art-style & gameplay mechanics!

That's very fair; those words are both bending the rules slightly, since they're really loanwords from other languages (Latin and Irish respectively) which are only used in English in quite specific circumstances.

(+1)

this was really cool! I wish it ran me around more than the couple puzzles it took me to beat it. I went back through and did most of them though :) 

(1 edit) (+1)

Do not mind that last comment, I was just being a little delusional.
Very nice puzzles, short and sweet.

Huge thanks for the puzzles.