Dog Tag Collector Achievement
The "Dog Tag Collector" achievement in Metal Gear Solid 2: Sons of Liberty requires you to acquire every single Dog Tag from every enemy soldier and officer throughout the game. This is a significant undertaking, as Dog Tags are obtained by performing a successful "hold-up" on an enemy. To perform a hold-up, aim your weapon at an enemy's head and hold the fire button. They will eventually drop their Dog Tag. It's crucial to note that some enemies will only drop their Dog Tag once, while others may drop them multiple times, but you only need to collect one from each unique enemy.
The challenge lies in the fact that enemies respawn, and their patrol routes can vary. You'll need to meticulously search every area, often backtracking to ensure you haven't missed any. Some Dog Tags are located in particularly difficult-to-reach areas or are guarded by elite enemies. It's highly recommended to use a guide that maps out the location of each enemy and their Dog Tag. Pay attention to the difficulty setting, as some enemies may not appear on lower difficulties. Patience and a keen eye for detail are essential to earning this coveted achievement.