Here is the full list of all 43 Unrelaxing Quacks Playtest achievements.
character:tutorial_duck
character:noob_duck
character:gangster_duck
character:cowboy_duck
character:ninja_duck
character:lady_duck
character:nauseated_duck
character:tanned_duck
character:rubber_duck
character:nerd_duck
game-finished
game-finished-no-damage
10000-mobs-killed
1000-meditating-ducks-killed
extra-life-used
100-deaths
10-deaths
100-sacrificed-ducks
1000-sacrificed-ducks
10-sacrificed-ducks
poor
10-towers-captured
10-towers-failed
risky
level-10
level-20
level-30
sacrificier
lady-finish
modder
teleporter
boatsman
gunmaster
crabs
corrupted
faster
2x-guns
noob-mode
restorator
character:potato_duck
character:pirate_duck
character:spider_duck
holy-mode