To complete the Bathroom Bomb challenge in 007 First Light, knock out Ramon’s bathroom guard from the roof skylight for an instant aerial takedown. This single stealth move completes the Bathroom Bomb challenge during the “Time to Die” mission.
Bathroom Bomb Challenge details

How to Complete Bathroom Bomb: Step-by-Step
Step 1: Reach Hung Villa’s Exterior
Approach Ramon’s Hung Villa.

But do not enter through the guarded front entrance.

Instead, head to the cliffs on the left side of the guarded entrance.

And begin scaling upward.

Step 2: Climb to the Villa Roof
Use your Q-Scan to identify and dodge guards patrolling the small alcove near the base.

Continue climbing the next set of cliffs.

Until you reach the villa roof.

Step 3: Hack the Bathroom Skylight
Once on the roof, locate the bathroom skylight directly above the guard below.

Use your hacking tool to open the skylight.

Step 4: Perform Aerial Takedown
Drop down through the open skylight onto Ramon’s security detail in the bathroom below.

This triggers an instant aerial takedown that knocks out the guard.

And completes the Bathroom Bomb challenge.

Critical Tips & Mistakes to Avoid
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Don’t enter through the front door – The guards will detect you immediately, failing the stealth requirement
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Don’t shoot the guard from outside – You must perform the aerial takedown by dropping through the skylight
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Time your climb carefully – Use Q-Scan to track guard patrol patterns before climbing the cliffs
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Don’t worry about double-dipping – This same takedown also counts toward “The Quiet Man” challenge, so you kill two birds with one stone
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If you’re detected – Restart from checkpoint and try again; this challenge requires you to remain undetected.
Mastering Bathroom Bomb is your gateway to efficient stealth completion in the Time to Die mission. Once you’ve dropped through that skylight, you’re already halfway to “The Quiet Man” challenge without extra effort.