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