Go through the portal is a mission objective in Assassin's Creed: Unity (ACU)
"Go through the portal" is a mission objective in Sequence 3 / Memory X: Server Bridge Paris 1898
Walkthrough[edit]
Turn to the East and start free-running for the massive portal that has opened. You will see a red barrier closing on the portal. This is the Server Sweep. keep to the rooftops and just run for the portal that has been opened. You have very little time overall. When you get to the building in front of the portal, climb to the very top of it. Only there will you be able to jump into the portal properly.
