It's up to debate whether Sins succeeded in this goal, but I. Sins of a Solar Empire is often described as a 4XRTS game, or a game that tried to merge the action and tactics packed gameplay of a Real time strategy game with the deep, complex, empire wide strategy of a 4X turn based game. Sins of a Solar Empire: Rebellion mod | Released 2011. Enhanced 4X Mod for Sins of a Solar Empire: Rebellion - Mod DB.