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