I'm new to this forum & joined to share with you the passwords I've found on that Gamestop gigapixel scavenger hunt. 
 
I found MORE than 25passwords!...If you havent read the rules & regulations, they're doing this for 4days (22-25) with a new image to search through every day.  Soooo, all 100passwords may be active from the getgo(I'm assuming 100passwords, because 4daysX25passwords). 
 
I found & redeemed 16 of the passwords myself last night.  I was on the phone with a friend whom found more passwords, but they were already taken.  I also asked my buddy to input the codes I've discovered & it did say "Good work soldier, but this code has already been found." 
 
Here's is the list of codes I found: 
HENRY 
MAXIS 
TEDDY 
ALIEN 
ARIES 
EIGHT 
TRUTH 
PROOF 
SNOWY 
DIRTY 
SR-72 
STORM 
MOUNT 
ROADS 
SKIES 
CLOUD 
*(and here are codes i've found that were already redeemed) 
WARD 
FIXIT 
TANK 
BUNKER 
31WR(more to this one i didnt write down) 
BRAND 
HOF 
PRICE 
635MQ4 
 
 
Soooooo, if you didnt notice, the first buncha codes I found are related to zombies.  "HENRY" is for HenryLanghams, "MAXIS" is Dr.EdwardMaxis, "TEDDY" for the bear in the randomweaponsbox, "ALIEN" because of the Co-Op gossip that was going around, "ARIES" because it symbolizes Mars(that's prob a code) & fits with the whole alien story, and "EIGHT" was the number scratched into the pistol on the cover of the game(just like the rounds in zombies.) 
 
So, a big thanks to whoever started this thread. 
AND A BIG THANKS TO MR. HENRY LANGHAMS FOR PROGRAMMING ME TO FIND THESE CODES!!!