Quake II - Unit 9 - Palace - Nightmare and 100% secrets
This is my walkthrough of QII PC ver. played on Nightmare difficulty including all secrets.
Keep in mind, that I used Quake2xp source port, which has nightmare difficulty considerably harder than vanilla Quake II.
Enemies are harder to gib and can respawn if they aren't gibbed, so gibbing enemies in this walkthrough has its purpose.