Assassin’s Creed Brotherhood Guide

Perks

There are a variety of Perks you can unlock for use in multiplayer. At the very start you cannot use any. As you rank up you unlock one and eventually two perk slots in your profile set. Perks remain active throughout the entire session.

Enhanced Autobash
While in high profile, increase the number of crowd characters you can bash before becoming unbalanced.
Unlocked at Level 20.

Wall Runner
Run slightly higher up a wall when starting a climb. You skip one ledge you would normally have to pull yourself up.
Unlocked at Level 22.

Resistance
Reduce the time you are affected by the stun by about 1.5 seconds.
Unlocked at Level 27.

Blender
When a player blends with a group, Blender automatically morphs a civilian into the same model as the player.
Unlocked at Level 30.

Fast Getaway
Reduce the time the player needs to escape his pursuer, once engaged in a Chase.
Unlocked at Level 33.

Chase Expert
Slightly increase your speed while chasing your target.
Unlocked at Level 38.

Overall Cooldowns
Reduce the cooldown time on all of your abilities by 10 seconds.
Unlocked at Level 40.

Silent Hunt
Slow the rate at which your detection meter decreases.
Unlocked at Level 42.

Kill Streaks

Kill Streaks are special XP rewards you can earn for going on a streak of kills. You can only select one per profile set. They are:

Streak Bonus +100
Get an additional 100XP at your 3rd kill streak.
Unlocked at Level 7.

Streak Bonus +300
Get an additional 300XP at your 3rd silent kill without dying.
Unlocked at Level 13.

Streak Bonus +250
Get an additional 250XP at your 5th kill streak.
Unlocked at Level 18.

Streak Bonus +750
Get an additional 750XP at your 5th silent kill without dying.
Unlocked at Level 31.

Loss Streaks

Loss Streaks are special ability or perk boosts that help you out if you go on a losing streak. You can only choose one perk profile set. They are:

Extra Precision
Unlocked at Level 4.
3 Loss Streak to Activate.
Compass precision is upgraded. Occurs after 3 contracts are lost in a row.

Reset Cooldowns
Unlocked at Level 9.
3 Loss Streak to Activate.
Reset the current abilities cooldown once the player loses a third contract in a row.

Score x2
Unlocked at level 17.
5 Loss Streak to Activate.
Double the total amount of your next kill points.

Boost Cooldowns
Unlocked at Level 28.
5 Loss Streak to Activate.
Divide by 3 all your current ability cooldowns until you perform your next kill.