The Infernal Machine is a three star difficulty Co-op Mission in Assassin’s Creed Unity, in which only 2 players can participate. The starting location is in Tuileries – Le Louvre district of Paris.
There are 3 hidden Sync points inside this Co-op mission.
Important Note: Before you start collecting the Sync Points complete the first Co-op Mission objective – Kill 9 snipers. If you don’t complete it, mission will restart, and you’ll be teleported to the starting location.
Sync Points Location
The first Sync Point is in Tuileries district, in the southern part of Le Louvre. Once the carriage turns right on the first crossroad, you can spot a huge tower. You can’t miss it, since it’s the highest building on this part of the map. It’s so tall that you can even spot it from the mission starting location. Climb on the rooftop and collect the Sync Point.To collect the second Sync point you have to go through an underground passage, in Vendome district. This underground passage is located to the west from the area where you have to complete the second mission objective – Retrieve intel about the plot. Once you enter the catacombs follow the tunnel until you come across the locked doors on your left side. Inside this hidden room is the second Sync Point.Third Sync Point can be found during the third Mission objective – Kill the Royalist Leader. This is another hostile area, located in the northern Le Louvre – Feydeau district. There are many snipers on the building rooftops. Be aware of them, since they can kill you easily. Head towards the northern part of the red area on the map. Climb onto the balcony on the last floor of the building then go down one floor, where you’ll find a locked door. Unlock the door and inside the room you’ll spot the last mission Sync Point on the table.