They are a cult of followers of Romulus. There isn't much about the Followers of Romulus in the history books; they were a pagan cult operating in abandoned locations underneath Rome. The cult worshipped the mythological founder of the city of Rome, Romulus, who was supposedly raised by wolves. The followers believed that Romulus was part wolf and part man, which explains their retro wardrobe and bad table manners :)
When Ezio discovers the existence of this cult, Ezio will have to go under the Coliseum in Nero's golden palace and there, he will find an ancient scroll of Romulus... Finding all the scroll of Romulus will definitely give a reward to Ezio.
During one of the sequence, Ezio needs to infiltrate a Pagan Party. How come?
Ezio sets out to cut of Cesare's funds by killing his banker, Juan Borgia. In order to find Juan he meets with a Senator who the Borgia wants dead for his former political actions. Ezio helps the Senator who becomes a supporter of Ezio's cause. Ezio then follows the senator to a meeting with the Banker's lieutenant. Ezio kills the lieutenant, then, disguised as him, infiltrates a Borgia orgy to find the Banker. At the orgy, Ezio learns that Rodrigo is unhappy with Cesare's appetite for power. Ezio kills the Banker. Claudia, who attended the party with her courtesans, appears. She is suddenly attacked but kills her attacker like a true assassin.
The brotherhood is now a central feature in the game, can you go in detail on that feature?
As Ezio progresses throughout the story, he chooses certain characters to join his brotherhood. As he recruits new novice assassin members, Ezio will be able to send them on assignments. As they perform assignments, the novice assassins will gain experience and will progress to become master assassins. These assignments will be given by Ezio using a unique animus interface. Ezio will be able to customize his assassins and give them specific weapons.
When they are not gone on assignments, Ezio will be able to call his assassins from anywhere and at anytime to help him complete his mission. When activated, the brotherhood emerges and will help Ezio to kill guards. Depending on the weapon Ezio equipped them with, they will fight differently. If Ezio equips them with crossbow, they will shoot from a distance, if they have swords, they will fight in close combat etc.
This is how we balance the system: As you collect Assassins, you gain 'tokens' that enables you to use them. The tokens become available after a Cooldown time, so players won't be able to spam them.
The other way we are going to balance it is the fact that Assassins can die. So Players that uses them in dangerous situation risk of losing them if they are not careful / doesn't assist them in fight.
Can you share some more information about the missions, their variety and their execution in Assassin's Creed: Brotherhood? Can you give us some examples?
There are various types of missions for Assassin's Creed that are not necessary part of the main mission path. Here are a few:
Borgia Towers: The city of Rome is under the influence of Rodrigo Borgia, Pope Alexander VI, and Ezio needs to claim "Borgia towers", which host the Holy Father's infantry throughout the city to reduce the military presence and thus decrease His Holiness' influence. This will help bring back Rome's prosperity and free the population from the oppression of the Papal soldiers. Each Borgia tower brought down by Ezio frees a specific zone enabling players to begin the rebuild process and allowing investments and upgrades to various buildings. These actions improve the area which is reflected through the area's mood and its inhabitants whose lives will improve.
In order to claim the Borgia towers, players must first infiltrate a militarized zone around the tower and then track and kill the tower leader. There are various approaches to get to the leader and sometimes, a stealthy approach is required while other times players will have to use all of Ezio's combat skills. In order to destroy the tower, players are confronted with a climbing puzzle and then must set the Borgia tower on fire- which is very spectacular!