Here is the full list of all 32 Cally's Trials achievements.
Defeat 100 Spiders
Defeat 100 Skeletons
Defeat 100 Turrets
Defeat 100 Hulking Bandits
Defeat 100 Balors
Defeat 100 Direwolves
Defeat 100 Fire Slimes
Defeat 100 Bees
Defeat 100 Smokeys
Defeat 100 Zombies
Defeat 25 Skeletons
Defeat 25 Hulking Bandits
Defeat 25 Balors
Defeat 25 Bees
Defeat 25 Spiders
Defeat 1000 Enemies
Defeat 100 Slimes
Defeat 100 Rabid Bats
Defeat 25 Turrets
Defeat 100 Knife Bandits
Defeat 25 Fire Slimes
Defeat 25 Zombies
Defeat 500 Enemies
Defeat 100 Bears
Defeat 25 Smokeys
Defeat 25 Slimes
Defeat 25 Rabid Bats
Defeat 25 Direwolves
Defeat 25 Knife Bandits
Defeat 100 Enemies
Defeat 25 Bears
Defeat 25 Enemies