Key of Osanalan

The Key of Osanalan is a fictitious Forerunner object underneath the city of Cleveland, Ohio on Earth. Colonel James Ackerson said that without the Key, the Halos will not properly activate.

However, the key does not exist at all. During their childhood, James Ackerson and his brother, Ruwan, made up an object called the Key of Osanalan for their make-believe games. It is likely Ackerson told the Covenant about the key to prevent them from simply destroying Cleveland.

After agreeing to give the Covenant their "Key", Ruwan informed them that he was in fact the key, and then told them he opened "Halo".

The ruse behind the key's true status lasted long enough for UNSC forces to destroy most of the Covenant forces in Cleveland, potentially saving the remnants of the city.

Trivia

 * Ironically, like all Reclaimers, if given the opportunity Ruwan could indeed activate the Halo rings, acting as a "Key" for the Installations.

Related Articles

 * Halo: Uprising
 * Battle of Cleveland