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