Here is the full list of all 64 Cally's Caves 3 achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete Survival 3
Defeat 100 Balors
Defeat 50 Bombers
Defeat 50 Circle Bots
Defeat 25 Robo Warriors
Defeat 100 Hopbots
Complete Survival 2
Defeat 100 Fire Slimes
Find All Regular Weapons
Unlock all Regular Game Zones
Defeat Herbert's Hovership
Defeat 100 Skeletons
Defeat 25 Circle Bots
Die 100 Times
Defeat 100 Bats
Defeat 25 Bats
Defeat 25 Bombers
Defeat 100 Mermen
Defeat 25 Shield Shooters
Defeat 100 Hulking Bandits
Defeat the Cyborg Colossus
Defeat 100 Bees
Defeat 25 Skeletons
Defeat 25 Balors
Defeat 25 Shield Bandits
Defeat 25 Skeleton Warriors
Defeat 25 Fire Slimes
Defeat 25 Hopbots
Complete Survival 1
Defeat 25 Ents
Defeat Queen Shelly
Defeat the Balding Eagle
Defeat 25 Hulking Bandits
Defeat 100 Spiders
Defeat 100 Slimes
Defeat 1000 Enemies
Defeat 25 Mermen
Defeat 100 Smokeys
Defeat 25 Bees
Defeat 25 Slimes
Defeat Buzz the Terrible Tarantula
Defeat 25 Spiders
Defeat 500 Enemies
Defeat 25 Direwolves
Defeat 100 Direwolves
Defeat 25 Knife Bandits
Defeat 100 Knife Bandits
Defeat 25 Smokeys
Defeat the Deranged Direwolf
Defeat King Carl III
Defeat 100 Robo Warriors
Defeat 100 Ents
Defeat 100 Shield Shooters
Defeat 100 Shield Bandits
Defeat 100 Skeleton Warriors
Max All Regular Weapons
Die 250 Times
Collect All Orbs
Collect All Diaries
Collect All Records
Collect All Mementos
Defeat Herbert
Beat the Regular Game
Beat New Game Plus