Here is the full list of all 42 Hobo Cat Adventures achievements.
Become a Snowball
Defeat a Snowman
Find all HOBO Letters in the Squirrel Kingdom
Collect more than 1000 coins
Drink a Coffee
Drink a HOBO BREW
Perform a Deathblow
Eat a Burger
Kill 5 or more enemies in one hit
Find a Moneybag
Defeat the Giant Carrot
Find all HOBO Letters in the Carrot Fields
Get the Banjo
Defeat a Rat Soldier
Get the Torch
Defeat a Rat Berserker
Defeat a Posion Thrower Rat
Defeat an Aggro Crab
Defeat a Fish Zombie
Defeat a Skeleton
Defeat a Skeleton Giant
Defeat a Skeleton Priest
Defeat the Ancient Fly
Defeat ???
Defeat the Poop Queen
Get the Baseballbat
Get the Dead Fish
Get the Katana
Get the Chainsaw
Ring the Swamp Bell
Ring the Beach Bell
Ring the Mountain Bell
Find every Moneybag
Find all HOBO Letters in the Snowy Mountain
Find all HOBO Letters in the Cursed Canyon
Find all HOBO Letters in the Swamp
Find all HOBO Letters at the Beach
Find all HOBO Letters inside the Ancient Fish
Get the GOOD Ending
Get the BAD Ending
Defeat the Polar Bear
Defeat the Bellkeeper