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