In Solar Ash, you take control of Rei as she tries to stop the Ultravoid from destroying her planet using a device she and the rest of the crew of "Voidrunners" call the "Starseed". As you skate around the ruined remains of previous worlds in the space-exploration odyssey, Rei finds these Voidrunner Caches left behind by the rest of her crew, detailing their experience in the Ultravoid.
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Collecting all of them in each area nets you a shiny
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