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