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