Here is the full list of all 56 Grim Clicker achievements.
Complete 100 quests
Perform 50 rituals
Perform 20 rituals
Kill 500 champions
Kill 10000 fireflies
Click 50000 times
Complete 50 quests
Kill 1000 fireflies
Upgrade weapon to quality 15
Kill 20 bosses
Upgrade weapon to quality 10
Open 30 chests
Upgrade weapon to quality 5
Reach Zone 50
Kill 10 bosses
Upgrade any item
Perform 10 rituals
Open 20 chests
Remove three locks
Remove one lock
Upgrade any weapon
Kill 5 bosses
Open 3 boss chests
Find people on the shard
Kill 25 champions
Get level 20
Get 20 wisdom
Get 15 wisdom
Get 10 wisdom
Get 20 dexterity
Get 15 dexterity
Get 10 dixterity
Get 20 strenght
Get 15 strenght
Get 10 strenght
Get 5 dixterity
Get 5 wisdom
Open 10 chests
Open shard chest
Click 5000 times
Collect 500 candles
Dissasemble any item
Complete 10 quests
Get 5 strenght
Get level 10
Kill 20 fireflies
Collect 250 candles
Reach Zone 10
Collect 100 Candles
Open 1 chest
Get level 5
Reach Zone 5
Click 500 times
Collect 50 Candles
Perform 1 ritual
Kill 1 champion