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