Sins of a Solar Empire: Rebellion is a standalone installment that takes the beloved RTS series into deeper 4X territory, blending real-time strategic decision-making with expansive galactic exploration and conquest. The game’s narrative is driven by a galaxy in turmoil, where factions once united against common enemies now face internal schisms. Diplomacy has faltered, ushering in a new era marked by factional splits and ideological divides.