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