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enter image description here

You're stuck in a virtual room. You tried to open the door but it seems to be locked. The robot guard opens the door's tiny window and looks at you.

You: Can you please help me get out of here?
The robot doesn't seem to be able to talk but he displays a message: 24D024CC246024DD24D324CD24BE= .

You question yourself what does that mean and the robot goes away. You're now able to see something blurry as you look through the door's window but you can't really see it.

You sit down wondering about the message and you notice something strange about the door and you also notice a bloody message craved in the wall "vRyZ2IZ".

The robot will open the door as soon as you shout the secret password. What is it?

Hint 1:

The bloody message and what you can find in the image are connected.

Hint 2:

The color of the message on the wall is important.

//

Credits to PixelDungeon for the Door picture used as base for the puzzle.

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  • $\begingroup$ It's "password" $\endgroup$
    – Moose
    Jun 22, 2016 at 14:59
  • $\begingroup$ You should try "guest" $\endgroup$
    – Business Cat
    Jun 22, 2016 at 15:33
  • $\begingroup$ None of them worked. :( $\endgroup$
    – andré
    Jun 22, 2016 at 15:33
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    $\begingroup$ The tag visual is not decorative only, it is essential to solve. $\endgroup$
    – andré
    Jun 22, 2016 at 16:15
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    $\begingroup$ The = at the end makes me think it's base64, but it's not. $\endgroup$
    – user88
    Jun 23, 2016 at 5:20

4 Answers 4

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the robots hex message decodes as the follwing text if taken as UTF16BE

ⓐⓌ①ⓝⓓⓍⒾ

that converted to ASCII and combined with the wall-scrawl gives

aW1ndXIvRyZ2IZ

this decodes as base64 to give ascii

imgur/G&v!

which seems to be incomplete.

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  • $\begingroup$ You're almost right in that part, almost, but that's not the full solution though. (: $\endgroup$
    – andré
    Jun 27, 2016 at 14:30
  • $\begingroup$ The image name sjf2r + vRyZ2IZ decodes to 7rgb - Thought it might be the name of another image file but wasn't :( $\endgroup$
    – Tikeb
    Jun 27, 2016 at 15:56
  • $\begingroup$ @Tikeb You're not on the right track :p $\endgroup$
    – andré
    Jun 27, 2016 at 16:10
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That´s what i think

I think they are Unicode Code Points ... After I translate the message (16 bits at a time) I got
ⓐⓌ①ⓝⓓⓍⒾ (aW1ndXI)
Which looks like the text carved in the wall (vRyZ2IZ)...

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    $\begingroup$ Can you clarify how you got that text? e.g. treating the numbers as hex gives a bunch of $'s (the "24" pairs) but most of the others are unprintable in most common encodings. What encoding were you using? $\endgroup$
    – Mark Peters
    Jun 22, 2016 at 20:00
  • $\begingroup$ I got the same thing; if you assume the message is 64-bit Unicode, you come up with the letters in the answer, but actually all inside circles. This is noteworthy in that this answer has the same number of letters as were scratched into the wall. But, since it doesn't take information from the picture into account, I don't think it's correct. $\endgroup$
    – Sompom
    Jun 22, 2016 at 20:04
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    $\begingroup$ So you're saying each 16 hex bits (24D0, 24CC, etc) represents a Unicode codepoint (which are max 32 bits)? That's the "enclosed letters" page: en.wikibooks.org/wiki/Unicode/Character_reference/2000-2FFF. Seems like a concrete lead. $\endgroup$
    – Mark Peters
    Jun 22, 2016 at 20:07
  • $\begingroup$ @MarkPeters -- Oops. Yes. No wonder I had so much trouble trying to find a 64-bit Unicode table... Those are the ones; as you say, if you take each 16 bits and plug them into that table, you end up with the enclosed letters which are given in the answer. $\endgroup$
    – Sompom
    Jun 22, 2016 at 20:09
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    $\begingroup$ @MarkPeters Dammit, so that was the pattern D: $\endgroup$
    – user88
    Jun 23, 2016 at 13:07
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I posted this as a comment yesterday, but it occurs to me I should post it as a full answer, buried as it is in the comments.

For those who have not zoomed in to have a look, there is something odd at the bottom of the door. Specifically, five pixels that do not belong. They have hex colours 3a2f12, 532f12, 602f12, 3c2f12 and 552f12. The surrounding colour is 4c2f12

For the curious:


Depending on how your browser renders images, it may appear very blurry. If that is the case, download it and open it with a real image editor, e.g. GIMP, then zoom in.

To decode this information, I have tried:

Notice that the hex colours all have the same last four hexdigits. If one takes the first two and naïvely decodes them into UTF-8, one gets the string:
:S`<UL
Which I can't make any sense of.

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  • $\begingroup$ That's a good start though. I've added a tiny hint on the main post. Good luck! $\endgroup$
    – andré
    Jun 23, 2016 at 15:42
  • $\begingroup$ those pixels you found are the only pixels in the image not in consistent 10x10 blocks. $\endgroup$
    – Jasen
    Jun 25, 2016 at 2:21
  • $\begingroup$ @Jasen - they are the only ones I saw, anyway $\endgroup$
    – Sompom
    Jun 26, 2016 at 5:06
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    $\begingroup$ I did a search, there are no others. $\endgroup$
    – Jasen
    Jun 26, 2016 at 5:24
  • $\begingroup$ Ahhh the colour on the wall is 7rgb $\endgroup$
    – Tikeb
    Jun 27, 2016 at 16:00
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At first I thought it was

Base-64 encoded, but when I decoded, I would get "ۀۀێۀۀۀۀD" which is definitely not right.

Then I noticed,

The door looks like something out of Minecraft, which made me wonder if it could be Base-32 encoded, so when I decoded that, I got "not a UTF-8 string", so that's obviously incorrect. However, the message appears to be in hexadecimal form

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  • $\begingroup$ I guess that sometimes things can't always be so straightforward. $\endgroup$
    – andré
    Jun 22, 2016 at 15:11
  • $\begingroup$ Nope :P I'm gonna take a little break and let some other people take a look $\endgroup$
    – Moose
    Jun 22, 2016 at 15:12
  • $\begingroup$ the door is from Pixel Dungeon, that is stated in the question. $\endgroup$
    – Jasen
    Jun 26, 2016 at 2:39
  • $\begingroup$ @Jasen - That the door is from Pixel Dungeon was only added a day or two after this question was published, and this answer was first added a few minutes after it was published :) $\endgroup$
    – Sompom
    Jun 27, 2016 at 16:02
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    $\begingroup$ @andré - The door was always there, but we didn't know where it came from until I did a reverse-image search using it and found that it came from Pixel Dungeon, after which I suggested you mention that was the source in the original question. Before that, Moose and I didn't know where it came from :) $\endgroup$
    – Sompom
    Jun 27, 2016 at 16:14

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