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