Assassin's Creed Black Flag Resynced - Overdesign IV Trophy Guide
To unlock the Overdesign IV trophy in Assassin's Creed Black Flag Resync, you need to kick a berserk enemy who is caught in smoke, off a ship.
This is easiest to complete when boarding a smaller to medium sized ship, as the lower railings make it easier to kick the enemy overboard.
Guide Breakdown
Whilst out at sea, find, attack and go to board a smaller or medium sized ship. Although the trophy can be unlocked on the larger ships, the side railings are generally higher and can make kicking the enemy overboard much more difficult.
Before boarding the enemy ship, equip your Berserk Darts, cycle through until you have the correct one equipped.
Shoot a couple of enemies on the ship with Berserk Darts before making your way across, getting a couple here will increase your chances of success overall.
Board the enemy ship and locate one of the enemies affected by the Berserk Dart. Move closer to the edge of the enemy ship, making sure the affected enemy is close by also, and use a Smoke Bomb to catch the berserk enemy in the smoke.
While the berserk enemy is still affected by the smoke, kick them towards the edge of the ship if they aren't already there, but do be careful not to assassinate or kill the enemy before fully kicking them overboard.
Once the enemy reaches the edge of the ship, look for the Takedown prompt, use the prompt whilst still kicking them, to kick them overboard.
Once the enemy flies overboard, the trophy should pop.
Remember to use more smoke bombs if the air clears too much, and know that this might take a few goes to get perfect, since everything happens in quite quick succession, so be patient with yourself and keep trying!