The Halo games don't necessarily have any spoilers to offer on this front, as Cortana's takeover of Master Chief's body is one of many plot points unique to the live-action series.

You can buy Halo: Combat Evolved Anniversary for $9.99 / £6.99 / €9.99 individually, or $39.99 / £29.99 / €39.99 as part of the full Master Chief Collection.

Halo 5 and every other older Halo game is also available on Amazon. You can also subscribe to Xbox Game Pass right now for just $14.99 a month ($1 for your first 14 days) and get access to a bunch ...

Check below to see the full clip, and below that is another clip showing Halo CE's original arsenal. Then finally we have the 1999 Macworld demo of Halo CE in all of its grainy glory.