Here is the full list of all 25 Zoop - there are Hunters Grimm achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Bet your Tongue is Out!
Get some Shades!
Get some Heart Eyes!
Get your Smooching on!
Don't end up like this guy!
Never Give Up!
Almost There!
Smiley Face For All!
That fake smile you like to give!
Better watch the After Shave!
Better get your schemes on!
Bet you got a Blank Stare!
Better not have a Annoyed Face!
Don't you wish everyone was like this?
When you don't care anymore!
You get a smily face!
You get a grinning face!
You must be Crying Laughing!
You must be ROFL!
You get a happy face
You get a laughy face!
You get an Ecstatic Face!
You get a Winking Face!
You get a doll face!