Assassin's Creed: Brotherhood cheats

In Assassin's Creed: Brotherhood, Cheats have been added to make gameplay more interesting. They are unlocked by getting 100% Synchronization for all of the memories in any given sequence. The cheats are only usable while replaying a memory, and can be toggled in the Options menu.

Warning: Cheats make gameplay significantly easier in most cases, but no progress will be saved while any cheat is active.

How to Unlock
Complete Sequence 1 with 100% Total Sync.

Effects
All horses are turned into unicorns, and all weapons have an added lightning effect.

Note
None of the memories in Sequence 1 have any optional conditions for completion. As such, this is the one cheat that is unlocked by progressing through the storyline as normal.

How to Unlock
Complete Sequence 2 with 100% Total Sync.

Effect
Invincibility - attacks do not damage Ezio. However, Ezio will still flinch from damage.

How to Unlock
Complete Sequence 3 with 100% Total Sync.

Effect
Any attacks made on guards will result in an execution kill.

How to Unlock
Complete Sequence 4 with 100% Total Sync.

Effect
All Recruits are given a female skin.

How to Unlock
Complete Sequence 5 with 100% Total Sync.

Effect
All Recruits are elevated to Level 10 (Assassino) with appropriate health, armor, and weapons.

How to Unlock
Complete Sequence 6 with 100% Total Sync.

Effect
Assassin Signals replenish instantly.

Note
Calling Assassins still remains the same; no more than 6 Assassins can be called at one time. When an Assassin vanishes from the battle scene, the timer is instantly replenished.

How to Unlock
Complete Sequence 8 with 100% Total Sync

Effect
Skin Unlocked - Able to equip Desmond Miles skin while in the Animus

Note
This is not an actual in-game cheat, but due to the method of unlocking, it has been classified as such. Contrary to popular belief, this does not make all Animus persona use the Desmond Skin.

Trivia

 * The Cheats concept is similar to that of the Animus Hacks featured in Assassin's Creed II: Discovery.
 * It is possible to ride a unicorn outside of a replay, even if the cheat is not available or active. This can be done by riding a unicorn with the cheat active, then returning to the current memory and calling for a horse with the Head button. By default, this summons the last horse (or unicorn) ridden.
 * In the PS3 and Xbox360 version of Brotherhood, the second cheat is misspelled as "Buns of Steal."