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