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