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