To unlock the RHP Master trophy in Assassin's Creed Liberation Remastered, you will need to synchronise all 19 of the game's viewpoints.
Viewpoints will be marked on your map with an eagle symbol. To synchronise them, climb to the top of the building/tree/pyramid and press
. Once synchronised, you'll reveal more of the map and collectables within a short radius of the viewpoint.
You can't unlock this trophy until after sequence 4 when you unlock the final area of the map.
A breakdown of where the viewpoints are located can be found in the spoiler tags below: