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