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