Each helix rift area has a set of artifact collectibles to find, which is easier said than done under a time limit. The artifacts unlock weapons and equipment and are required for 100% completion. I replay this area a few times for artifacts. I'd already found one when I played the tornado Belle Époque mission, here I find another four. I check Uplay before attempting to look for artifacts, to see if there are any maps I can unlock, there aren't but I do discover a bonus murder mystery I never knew about. To skip the Uplay stuff go to 3:38. At this point the PS4 started flashing my real name above trophies (after a system update). I know it's not a big deal but it wasn't something I particularly wanted so there will be a black bar over the next few trophies I get. Full Playthrough here • Assassin's Creed Unity - PS4 - Full Playth...