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