Hello out there :)
This guide is to help you and your team to overcome the challenges of the Nightmare difficulty in Undead Assault Chronicles offers to you. This guide will cover all needed information and of course a detailed walkthrough of all missions in NM.
This is by no means a guide to 100% success. You will need a lot dedication and above average skills in controlling your character and decision making to succeed. But even the best Soldier is lost if his team is not working together and communicating as a team.
Good Luck out there soldier, dismissed. -Andx