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.
The Bride
Zombinator
Undeadz 4 Lyfe Yo
What's On Tv?
Shekly Shot Eye
Dead Monk
Prep For Bravery
Zombie Slayer
Hawk Eye
Tea Party
Underground
Kill 100 Menu Zoms
Kill 50 Menu Zoms
The Beauty Of Birth
Zombie Hunter
Hell's For The Homeless
Don't Smoke
Chewy Dogz
Some Tongue?
Trip 'Em
Hard Ass Hooker
Blow 'Em Up
Survive 15 Minutes In Menu
kill 500 Menu Zoms
Zombliterator
You'z Got Bit
Killer Clown
Back To Back
Rasta Gonna Get Ya!
No Where To Run