In Uncharted: The Lost Legacy, executing silent takedowns provides a strategic advantage when dealing with foes, particularly in stealth scenarios. The methods to perform these takedowns vary depending on the environment—whether from ledges or underwater—each requiring specific approaches and tactics.

Takedowns from Ledges
1. Positioning: Prioritize finding a ledge where you can hang unnoticed above your target.
2. Approach: While hanging, slowly edge towards the enemy to avoid detection. Timing is key; ensure that the enemy is unsuspecting.
3. Execution: Once in position, press the melee button (Square on PlayStation) to initiate a stealth takedown. Your character will seamlessly pull the enemy up and eliminate them quietly, which prevents alerting nearby foes.

Underwater Takedowns
1. Approach: Underwater takedowns are more restrictive. You must carefully swim behind an enemy who is either submerged or in shallow water. Stealth is crucial here, as enemies can notice you if you approach too quickly.
2. Execution: When in close range, press the melee button (Square) to perform the silent kill. Be mindful of your surroundings, as visibility and detection mechanics differ underwater compared to land.

General Tips for Stealth Takedowns
– Utilize Cover: Move between obstacles to stay hidden from enemy sightlines. Crouching can further enhance your stealth approach.
– Marking Enemies: Use the L3 button to tag enemies, which allows you to track their movements effectively. This helps in planning your routes for approaching them without raising alarms.
– Difficulty Settings: Adjust the difficulty accordingly; on higher settings, enemies are more perceptive, making stealth tactics more challenging. Playing on Explorer or lower can make stealth gameplay more forgiving.
– Dealing with Armored Enemies: When facing tougher adversaries, you may need to disarm them first. During a takedown, if the enemy is wearing a helmet, press Triangle when prompted to remove it before finalizing the takedown, ensuring a successful silent elimination.

Summary
To perform silent takedowns in Uncharted: The Lost Legacy, whether from ledges or underwater, focus on undetected approaches and execute the melee command at the right moment. By understanding your environment and employing tactical stealth strategies, you can effectively neutralize threats without raising alarms, allowing for a more immersive and strategic gameplay experience.