you do need sound
That was really fun. I did almost all of it on my own, I looked up the following hints:
-the notes to a piano (I don’t know the keys)
-the location of the third panel
-the board in the room (I didn’t see it, I didn’t look up what to do with it, just that it existed)
The puzzle aspects of it, such as the cubes and stuff, were genius, I love things like that!
-mark
i have a key that resembles a freezer key, dont know wtf to do with it. this is nice though, will help me burn through work today! haha
I got it with a few hints. cool beans
I needed the basic walk through after about an hour of just staring at the walls but finally finished. ugh.
that burned half my day :tup:
Any more where that came from?
EDIT: Typing that made me just figure it out. I wasn’t thinking outside of the box enough 
I can’t get the cube one.
There are 9 un-numbered buttons, but the die only goes up to 6.
I have written down the sequence of colors and found the corresponding number to the color. But, when I dial in the numbers where I’d think 1 through 6 should be I get nowhere.
How do I find the numbers for the keys?
Hint: Look at how the numbers on a die look…
Had to get a coworker to help me with the piano keys since I don’t know music at all and resorted to hints for the combo on the hidden keypad. Other than that it was just a lot of wasted time. Thanks for killing my productivity today at work.
If anyone else want’s to continue on these, the website notpron.com is still the hardest one out there I am pretty sure.
I’d like to find more that are just a little easier than this one so I could complete it without needing any hints.
Still kinda pissed how small they made the ABCD 4321 legend on the one keypad. Not sure how you would ever had seen that without the hints. Maybe if you had a 25+" monitor running at 800x600.
Couldn’t figure out the code for the last panel. I have better uses for my time, fuck this puzzle.