To unlock the Magna cum Laude trophy in Assassin's Creed III Remastered, you will first need to recruit an Assassin. There are six available in total, and they can be recruited by liberating districts in Boston and New York.
To reach the Assassin Rank, you will need to get one of your recruited Assassins to level 11 which requires a total of 1,100 EXP.
You can earn EXP for your recruited Assassins in two ways:
Contracts:Hold
and press
to go to the contacts menu. Here you can select areas on the map and send an Assassin on missions. Unlike some of the other Assassin's Creed games, you're Assassin can't die during missions, they only become injured, so just keep sending them out on different missions to earn EXP.
Summon in Combat:During combat, you can summon your recruited Assassins to come and fight beside you. Keep summoning them when you have the chance and this will help level them up quickly.