Main Mission Constraints: -Limit collision / environmental damage to 20% -Stay within 500 meters of the Schooner -Perform a single killstreak of 3 So, this is a bit of a long one! But not too rough in the end. While you are controlling the ship, you need to ensure you do not lose more than 20% of your health to collisions or environmental damage until you reach the section of the memory where you are fighting ships. This is easier said then done, but if you are ensuring you are using the Full Sail, Half Sails and Stop speeds to the best of your ability, you'll be in the best position to avoid taking a ton of damage. Check out 00:58 in the video for some more tips and how I navigated the areas. Once the Schooner pops up, you will need to ensure you maintain a distance of under 500 metres from the ship AND you still need to ensure you do not take too much collision / environmental damage. It isn't too rough staying close to the Schooner, so just try your best and take whatever path feels best to you. Check out 02:42 in the video to see the path I took for this. After you follow the Schooner as far as you can, you will have completed the first two 100% synchronization requirements, should you have ensured you adhered to the constraints. Once you have completed the two requirements, you will be in a ship fight. Nothing too crazy, and it just results in you boarding the Man O' War. To see how I completed this fight, go to 05:29 in the video. Finally, once you have boarded the Man O' War, it is time to get a killstreak of 3. This is kind of easy to do, but just due to the abundance of enemies fighting allies, you easily get interrupted. Basically, my recommendation is to go into large groups and try your best to kill as many enemies as possible as quickly as possible. It may take you restarting your checkpoint once or twice and getting lucky, but after enough attempts you will have completed this 100% synchronization requirement! Check out 08:36 in the video to see how I completed this Main Mission Constraint. Once you have completed the final 100% sync requirement, kill the remaining officers and complete the memory to achieve 100% Synchronization. I hope this video was able to help! For more 100% sync walkthroughs, check out my playlist: • 100% Sync Guides - Assassins Creed 3 Remas... And for Assassin's Creed 3 Achievement / Video Guides, check out my other playlist: • Achievement / Video Guides - Assassin's Cr... Recorded on the Xbox Series X using an Elgato Game Capture HD 60S+. Get in touch with me: [email protected] Add me on TrueAchievements (and sign up if you haven't already): https://www.trueachievements.com/game... Timecodes: 00:00 - Intro 00:58 - 100% Sync - Limiting collision / environmental damage 02:26 - Cutscene 02:42 - 100% Sync - Staying within 500 metres of the Schooner (and no collisions) 05:29 - Fighting ships to board the Man O' War 07:49 - Cutscene 08:36 - 100% Sync - Getting a killstreak of 3 10:04 - Memory Ending 13:41 - Outro The copyright free music I used in the outro: [ocean jams] - Leaves: https://www.epidemicsound.com/track/k...