In Aphelion, the player takes on the role of the reckless soldier Savion Mercante, a soldier of the Ereit Peacekeeper group, who has assigned him, his friend Ashley and their commanding officer Ceda to investigate an attack on a human colony by an alien race known as the Crimsons. During this investigation, they save a senior Crimson ambassador. As a result of their heroics, they are selected for a special mission to locate and rescue the scientist Delith from the crimson on a distant planet.
Gameplay is turn based sci-fi shooter with an RPG upgrade system, allowing you to upgrade Savions stats, as well as the stats of his squad which give them new offensive and defensive abilities.