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