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