This interlude will occur directly after finishing Sequence 07.
Make your way through the streets of Paris toward the portal and climb the wooden structure to leap of faith into the portal.
You begin in the sewers under Paris, so head through and climb to the surface just next to the Eiffel Tower. You want to stay out of the spotlights in the following mission to avoid gunfire, so climb over the tank and head for the base of the Eiffel Tower where you can run to a gap in the fence and begin your climb. As you climb up the structure you’ll want to avoid the spotlight again.
Arno will climb up onto the small ledge where you can run right to trigger a small scene that causes Arno to drop inside the Eiffel Tower’s metal structure. Cross the beam and jump from one hanging platform to another to the metal mesh on the other side and climb up. Head straight up the restaurant facade and turn left to jump to the lift shaft and climb up to a ladder.
As you run around the outside of the Eiffel Tower a plane will shoot down at your location, so take cover behind the boxes and then move up the the machine gun. You’ll need to shoot down the plane as it passes, but avoid its fire by holding L2 / LT when it passes to fire. When the plane is taken care of climb up the boxes nearby, and climb the rope up to the Zeppelin for a scene. After the quick scene you’ll need to climb the tail of the Zeppelin and cross the rope to a lift.
Once you land hop on the metal wall and begin your climb again, avoiding the spotlight, until you reach the barbed wire and enter the V shaped metal on the left to access another elevator and climb up for a scene.
Climb up and head outside again for another encounter with some planes and then man the machine gun. Once again you’ll need to take out both planes, so focus your fire on the planes up until a few seconds after they begin to fire on you before you hide and they should be gone pretty quickly.
Make your way around the outside of the area to climb some boxes and then make your way up the center pillar to the top of the Eiffel Tower. When the portal shifts perform a leap of faith into the portal.