Here is the full list of all 30 Pixel Puzzles: UndeadZ achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Blow 'Em Up
Trip 'Em
Survive 15 Minutes In Menu
Kill 50 Menu Zoms
Kill 100 Menu Zoms
kill 500 Menu Zoms
Zombie Hunter
Zombie Slayer
Zombinator
Zombliterator
You'z Got Bit
Hard Ass Hooker
Some Tongue?
Chewy Dogz
Don't Smoke
Hell's For The Homeless
The Beauty Of Birth
Underground
Tea Party
Hawk Eye
Prep For Bravery
Dead Monk
Shekly Shot Eye
What's On Tv?
The Bride
Undeadz 4 Lyfe Yo
Killer Clown
Back To Back
Rasta Gonna Get Ya!
No Where To Run