Metal Gear (MSX) Big Boss Rank Walkthrough 

Metal Gear is one of my favorite franchises and for years, I've wanted to attempt a Big Boss rank run on each of the games. This will be a long-form series where I will be doing a Let's Play first to revisit the story of each game, then a walkthrough to help players achieve Big Boss rank.
This video is the walkthrough to achieve Big Boss rank on Metal Gear (MSX).
Requirements
Difficulty: Original
Completion Time: 44:59
Saves: Infinite
Continues: 0
Humans Killed: 0
Alerts: 8 (All 8 are unavoidable)
Rations: 1 (Typically used on the electrified floor before Metal Gear)
Special Item: Not Used