Informer

Informants are fellow members of the Assassins' Order who can offer you aid in your investigations of your assassination targets. However, before you can get this information from them, you have to complete a small task for them. Informants can be found within the three cities of Assassin's Creed by climbing View Points.

Tasks

Before revealing their secrets to you, Informants will either ask you to collect flags, or assassinate targets without being exposed.

Flag collecting

An Informant may test you, by asking you to collect flags. This is to be done within three to five minutes, or without limitations. Then, you must return to the Informant.

The flags will always be placed in a path, not randomly. Sometimes, this path will bring you to a flag other than those for the test, like a Templar or Hospitalier flag. It is highly recommended that you have your GPS enabled while performing this task.

Assassinations

Sometimes, your comrade will have angered a knight, or a group of knights. Fearful for their life, they will offer to give you information if you assassinate the offending knights within a set time limit. In addition, you must not become Exposed- if you become exposed even once, even if only for a second, you fail the mission. Once all targets have fallen, return to your Informant.

You must either use your Hidden Blade or Throwing Knives. If you use the Hidden Blade, Blend to reach your opponent, then assassinate him quietly. Escape quickly but quietly.

Throwing Knives are more straightforward: just climb atop a building, find the target, lock on, and throw the knife. A knife, if it hits, always kills a knight. Beware rooftop archers.

Trivia

When approaching an Informant with the Hidden Blade, it is possible to assassinate him. Although the prospect is tempting, it is best you complete his task before trying anything ridiculous.