Doom (2016) NO DAMAGE Nightmare Difficulty 100% Walkthrough Part 1 - The UAC

Let's try to finish Doom without taking a single damage! and collect all the secrets and complete all the challenges! I didn't choose the "Ultra Nightmare" difficulty because it is impossible (at least for me) to complete the game with No Damage without using any checkpoints for multiple attempts. Doom AI is dynamic and enemies can almost always surprise you even if you know where each one is located.

The UAC

Main Objective: Find the Resource Ops Entrance
New Weapons/Equipment: Pistol(intro), Combat Shotgun(03:25), Frag Grenade(10:29)
New Monsters: The Possessed, Imp, Possessed Soldier

Collectibles:
Blueguy: Combat Shotgun Model 10:14
Classicguy: Imp Model 17:35

Classic Map: Doom 2 - Entryway: 13:08

Data Log #1 07:04
Data Log #2 15:08

Secret #1 10:14
Secret #2 13:38
Secret #3 17:35

Elite Guard #1: 12:21

Field Drone: 14:46