Who Is the Weapon? Halo Infinite’s New AI Explained

The Weapon, a new AI companion for Halo Infinite, talks to Master Chief.
Credit: 343 Industries

In the Halo Infinite Campaign Overview, fans were left intrigued by a brand new AI character known as The Weapon. Here's what we know so far about her.

If you haven't already, check out the Halo Infinite Campaign Overview trailer below. The Weapon first shows up around the 1:22 mark.

It sounds like Master Chief's very first mission in the campaign will be to retrieve The Weapon, an AI created in order to lock down Cortana, Master Chief's last AI companion. The Weapon doesn't seem to know exactly what Cortana did to deserve this - we're sure this will all get explored a whole lot through the Halo Infinite campaign.


We know her AI codename is 'CTN 0453-0' thanks to the Discover Hope trailer from E3 2019, and that her duty was to imitate Cortana and lock her down for retrieval, so Master Chief can take her to the UNSC Infinity for deletion.

Well, it seems that plan failed. The Weapon's deletion was supposed to occur when she successfully carried out her duty, but it failed to do so. Now, the mission she and Master Chief are going on has changed - she must find out why she was not deleted and the mysteries behind Cortana's recent story.

Personality-wise, The Weapon comes across as a well-meaning, if slightly naive, character. She seems genuinely concerned about not knowing why Cortana was set for deletion, and readily hopes incoming brutes are friendly (when Chief knows they're not).

She's got a quip in her too - snarkily bantering with Master Chief to counteract his one-liners and offering solid advice on the battlefield. We have high hopes for The Weapon. Hopefully, the Halo Infinite story can answer our questions. You can play it on December 8th on Game Pass, and check out the best guns for multiplayer too.