Here is the full list of all 44 Imprisoned Light achievements.
Complete co-op game.
Die 1000 times.
Get resurrected 100 times.
Die 100 times.
Complete single player game.
Clear the Hell.
Collect 1000000 souls.
Kill 10000 monsters.
Collect 10 peace pot.
Clear the Shores of Damned.
Clear the Limbo
Kill 5000 monsters.
Kill 4000 monsters.
Kill the reaper.
Kill 3000 monsters.
Save 50 crystals.
Clear the Catacombs.
Kill 2000 monsters.
Unlock the Fire Bomb
Unlock the Fire Shuriken.
Activate special power 100 times.
Unlock the Frost Shuriken.
Unlock the Shuriken.
Unlock the Fire Spear.
Unlock the Frost Spear.
Unlock the Spear!
Kill 100 enemies using special power.
Unlock the Fire Sickle.
Unlock the Frost Sickle.
Unlock the Sickle.
Kill 1000 monsters.
Unlock the Fire Sledgehammer.
Unlock the Frost Sledgehammer.
Unlock the Sledgehammer.
Unlock the Fire Axe.
Kill 500 monsters.
Unlock the Frost Axe.
Unlock the Axe.
Unlock the Fire Sword.
Clear the Sanctuary.
Unlock the Frost Sword.
Unlock the Sword.
Kill 100 monsters.
Start a co-op play.