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