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