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