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Jul 8, 2012 | 6:59 AM EDT
  • Daily 2nd Place July 9, 2012

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UPDATE 4 (8th September 2012): IR/RATIONAL INVESTIGATOR ANNOUNCED! /sharedfiles/filedetails/

UPDATE 3: ir/rational has made the front page with 45,000 plays in under a week! Thank you everyone - and keep your eyes peeled for announcements in the coming months!

UPDATE 2: Walkthrough available here: /2012/07/irrational-walkt hrough.html

UPDATE 1: Made 10,000 views and the Popular Games list in 24 hours! Thanks to everyone who's played!

Argue the toss in a twisted tale of logic...

In ir/rational you complete, create and discredit arguments by selecting propositions and filling in the blanks. It's a puzzle game based on propositional logic, and a graphic adventure all in one - only here you don't so much need to escape the room as prove why you'd even want to.

- Unique, language-based argument system: formulate logical proofs to progress through the game

- Dark philosophical comedy by Tom Jubert, writer of Penumbra, Driver: San Francisco and FTL.

- 10 screens and roughly half an hour of intelligent, challenging and inventive gameplay

- Musical score by award-winning composer Mikko Tarmia

My website:
My narrative design blog, Plot is Gameplay's Bitch:

- Click to progress story
- Complete the arguments by selecting options from the drop-down menus

NB Some systems don't display all the dropdown options at once, and you have to use the arrow keys to scroll.

If you can't see the right answer, chances are you can resolve the problem with the arrow keys. Hope it's not dampened your enthusiasm!



Rated 4 / 5 stars

i beat it ._. and im no genius..just simplify it and it will be ok, hard game to start off but as soon as momentum is built it becomes difficult still lol

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Rated 5 / 5 stars

Very good game.
Got confused but still very interesting.

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Rated 4.5 / 5 stars

I am hopelessly stuck on the SECOND-last level, and I pride myself upon being quite good at these things, and it frustrates the hell out of me, which earns you a star rating right there. I shall return to this game to finish it another time, of course, it is NOT allowed to win. So what I would have wanted from it is MORE questions in order to raise the difficulty lever SOMEWHAT easier than now. Great idea, though.


Rated 3 / 5 stars

level ten made no sense, i dont care how smart you think you are, or how many levels you "did with out any hints" I honestly needed a lil more like what the arrows represented or something, i mean really fun and mind stimulating game but i think theres something off with lvl 9 and ten was just off, i just guess with similar symbols till i got it, it was like A -E O or something? like there was no clues to that


Rated 5 / 5 stars

nice game, I really like it! especially that last one... It took me a couple minutes to realize that the G and the M were statements of their own. but this is a nice logic puzzle game, that is definitely a challenging use for a couple minutes. I hope you make more! But for now, I will just have to play again! SO FUN!