What's the solutions? Rare's official site has this to say:

"He is a dead agent, killed by the dataDyne squad as they took over the villa. You don’t see him again because he is dead. If you're too slow getting to see him, all you will see is his sniper rifle on the floor of the bathroom since his dead body will fade away."

That settles that, no?

Solved Mystery #17: The invisible pipes.
Description: Play the Attack Ship - Covert Assault mission on any difficulty, making sure to use a cheat to begin with an X-Ray Scanner or FarSight rifle. Make your way to the room at the top of the twin elevator shafts that carry Joanna and Elvis up from the ship's shuttle bay. Once you arrive, activate your Scanner or FarSight. You should see what looks like a set of previously invisible pipes connected to an equally invisible cylinder-shaped object in the center of the room.

How to explain this? Well, it turns out that you're right below the room that contains the glowing shaft that is the Skedar ship's engine core. The same one that must be blown up to satisfy a mission objective on the higher difficulty levels. You'll notice that the room containing the core seems to have a reflective floor. This is an illusion.

In order to accomplish the reflection effect, the programmers made the floor a transparent texture and created an extension of the shaft and its support pillars that extends below it, creating the appearance of a mirror image. These structures occupy the same space as the room below. From below, where you stand at the top of the elevator shafts, however, they are invisible, and you usually pass through them without even noticing.

Solved Mystery #18: Mr. Blonde's exploding ship.
Description: Yes, believe it or not, you can indeed blow up Mr. Blonde's space ship, albiet in a highly unusual fashion.

Unlike many of the other Skedar ships encountered during PD, which meet with a fiery end, conventional wisdom holds that the shuttle on the roof of the dataDyne building that Mr. Blond must escort Cassandra De Vries to in order to complete the Mr. Blonde's Revenge bonus mission is invulnerable. Technically, this is correct. However, simply because the ship cannot be destroyed, doesn't mean you can't blow it up.

How is this possible, you ask? As you may be aware, targeting the ship itself with gunfire and explosives has no effect. Instead, you must use explosives against a nearby, apparently nondescript portion of the building's rooftop, specifically on an area of the roof where a security camera appears when the level is played on Perfect Agent difficulty.

I'll elaborate: The rooftop of the dataDyne building contains either one, two, or no security cameras, depending on the difficulty setting of the mission. The area that you must blow up is that occupied by the second camera, which appears only when the game is set to Perfect Agent difficulity.

When the right area is struck by an explosion, Mr. Blonde's nearby Skedar shuttle will burst into a truly massive fireball identical to the one created by other exploding ships in other levels of the game. When the smoke clears, however, the shuttle will still be there, completely intact. Strange.

The answer? It turns out that the explosion is caused by the Skedar bomb that Mr. Blonde carries! It is stored here on the roof until you select it from you inventory and plant it in the elevator, whereupon it is automatically moved there. Mystery solved.

To propose a solution to some of the mysteries presented here or to suggest a new mystery contact me at: greenyamo@hotmail.com