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>>718357339
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>You play as a not-combatant crewmember of the In Amber Clad, an engineer or scientist, that got made a prisoner in High Charity with a group of other humans.
>When the Schism began you and your mates manage to break free, but after a skirmish you got separated.
>You can use UNSC guns, but they are hard to come by in here and you can't use them very effectively (shaky aim, high recoil, long reload time, etc). Covenant guns are alien to you (he), you don't know how to operate them.
>Cortana helps you a little, since she is in the system, but it's clear that her's and Chief's mission has priority.
>1/3 of the game in, the Flood arrives to the city. They slowly cover everything with their putrid biomass.
>The forerunner dreadnought escapes, leaving High Charity powerless and in darkness.
>In the end you find a dropship and leave, ally with some elites and leave, or straight up die.

The worst part is that 343 actually wanted to make these sort of fringe games, but were turned down by Microsoft executives. Several times.