Hopefully in the story, or sidequest, or a dlc I don't care which we get to find out who built the exo. Maybe a counter force anpgainst the Vex? A weaponized ghost companion? Souls of those returned from the void?
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Edited by Longestfellow: 7/29/2014 4:43:05 AMIm pretty sure in some dialogue it said we(humans) built them. edit from the wiki: [quote]Exo began as self-aware war machines developed by humanity during the Golden Age[2] for a long forgotten war,[1] with the sole purpose of protecting their creators.[3] They were rebooted during the collapse and now have no memory of their original function.[/quote]