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