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