Very Dead Trophy
Complete A Mission On 'Undead'
You unlock Undead difficulty after you complete the game on Morbid. You only need to play through one level on this difficulty, so it is recommended you play the first level. Compared to the ending of the game on Morbid this level should be very easy. Enemies are faster, but charged rifle shots are still one hit kill on non army zombies, and most of the level can be ran through without killing all of the zombies. Only place that may cause issue is the last area before the end of the level. Be sure to use the cars with alarms to draw as many zombies as possible and save any grenades and flares you have for this part as well.