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