Here is the full list of all 15 Die After Sunset achievements.
Kill 100 murkors in one level
Complete 3 missions with 3 stars in a single level
Complete 5 missions in a single level
Defeat the Murkraken
Complete a level without collecting items
Collect 50 Mukus without using the bank
Throw 20 lux grenades during the same level
Complete a level without killing dark murkors
Defeat the Murkmukus Brothers
Defeat the Murkrampus
Defeat the Murkraknarok
Collect 100 Mukus with Hune
Kill 500 murkors with Hune
Complete 5 perfect events with Hune
Defeat the Negamurk