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