Happy Cake Day to Me! :D:

I just realized it's been 3 years I'm hanging around with you bastards - if it's not opportunity good enough to call it quits on my puzzle retirement I don't know what is :D: Anyway - prepared a little puzzle for ya - I'm very rusty in puzzle-making (been over a year since I prepared a proper one) so zelgh-style considered this one should be super-duper-easy. So GL all :>

Game to Win: Legend of Grimrock 2
Level Requirement: Lvl 1+
Special Requirements: All SG Wins activated on your account, not being on my Blacklist.
Time: You have 1 week.

All puzzle cheaters / GA leakers gonna be blacklisted as well as immediatelly reported to support. No sharing hints / ideas in this topic nor anywhere.

Oh and if you want to check if you are Blacklisted or not, you may do so here.

SOLUTION

9ppl managed to solve the puzzle with just 5 entering GA. Fastest solver managed to do so in a little bit more than 2 hours since puzzle got posted, Last solver solved it just 16 hours before GA ended. To all the solvers - I salute you and am impressed by your puzzling skillz :>

Now to the main course :>

Actual first stage of the puzzle was "Blacklist Check GiveAway" posted in OP.

A the start of GA Description there was a hidden link You may see on this image.

Hidden link http://www.itstoohard.com/puzzle/7bqxnt?? was missing 2 letters ??.

Hint to these two missing letters was cake picture in GA description. The cake represented New York's Empire State Building, it was also posisble to reverse google search the image and find it's listed as NY cake. Pretty obvious - 2 missing letters were NY and full ITH link was http://www.itstoohard.com/puzzle/7bqxntNY

At ITH stage you were presented with 20 questions in yes/no form. Full ITH solution can be viewed here.

After solving ITH you were presented with QR Code, but sadly the code was broken and wasn't working :(

By image editing of your choice (you could do so with changing color's pallete, saturation and other stuff in Photoshot/Gimp, but also could use simply probe tool, or filling tool from MS Paint) you could notice that some of "pixels" on QR code weren't in fact pure black. Black color has hex value of #000000 and some pixels had color value of #010101. Very similar but not the same :D: To be exact there was EXACTLY 20 altered pixels.

You can view all 20 "fake" pixels on this image.

Now notice this. There are 20 fake pixels in QR code. There are also 20 questions on ITH. Even more - all answers are in yes/no format, so either true or false. Does it ring the bell? It's just like binary or Boolean data type or however you want to call it ;)

And yes - eqach question corresponded to a single pixel. If Answerr was Yes (True/1) the pixel should be black, if answer was no (False/0) the pixel should be white. Proper colors/values of pixels can be seen on this image. Red pixels represent ones that should be black, while green pixels represent ones that should be white.

Original non-altered QR you would get at the end would look like this image.

Decoding this QR would give you 5 letter code qzodt which was GA code for main GA: http://www.steamgifts.com/giveaway/qzodt/legend-of-grimrock-2 :>

NEWS:

7th solver so far :>

We have a grand total of 6th solvers so far, but only 4 entries - so still great win-chances! Gogo solve t3h puzzle! :>

We have 2 more solvers - plus one of them is a total newbie - it's his 1st puzzle solved! :> That meas that no matter if you're a veteran or a fresh blood - this puzzle is for everyone! :>

We have our 2nd solver - took him 6 hours but again - without any hints! See? It's totally doable so gogogo - I want me CV so at least 3 peeps more ;p

We have our first solver! Without any hints whatsoever and done it in only 3 hours! CONGRATS YOU MAGNIFICENT BASTARD!! :> Also so far only 6 other people reached last stage so keep on trying - this GA will probably have really high win-chances so it's totally worth a try :>

HINTS:

Only hint you need
(and a little bit of brain-work ;>)