The Windows Phone title with, what I would say are by far, the easiest achievements on the platform is this week's deal. Not to mention it's pretty fun!
Collapse! (WP) - $2.99 / £2.49 $1.99 / £1.49
The blockbusting, color-matching excitement of COLLAPSE! returns with award-winning gameplay, all-new customizable characters, and fantastic foes like the mighty Blocktopus and Blockula! Travel a huge new world, use explosve power-ups and purchase powerful upgrades to bust those blocks. Enjoy challenging gameplay variations such as Classic, Puzzle and the all-new Relapse mode. Take on all of the fun challenges in this new title from the mega-hit series: COLLLAPSE! with character!
We've got the full list of Collapse! (WP) achievements - check the list for guides to unlocking them.