I've just confirmed that this achievement is completing all 180 puzzles and not just completing any 180 puzzles.
I have 90 solutions (1-30 SE, 1-20 E, 1-20 M, 1 & 2-20 & 28 D) and I am willing to trade for the other 90 solutions if someone has them or parts thereof!
One last thing; I HATE THIS F***ING GAME!
(sorry)
I can't edit my original message, so I have to create a new one. That's clever!
Anyway, I've now got all 45 Super Easy solutions on my digi-camera. If anyone can help with 21-45 for Easy, medium & Difficult please send a message on XBL.
All 180 solutions will soon be available at XBOX360ACHIEVEMENTS.ORG if anyone really wants to waste a day typing in all that crud!
Good luck!
(mods; please close this thread!)