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