The intergalactic war of Ironclad Games' real-time strategy game Sins of a Solar Empire has gone on too long, prompting the game's third expansion, Rebellion, packed with new tech and ships capable of destroying entire fleets all by their lonesome.

Developer Ironclad doesn't call Diplomacy, the second add-on to its popular PC space strategy title Sins of a Solar Empire, an expansion. It's called, fittingly, a "micro-expansion."

Stardock announced multiple "micro-expansions" to be available for Sins of a Solar Empire throughout the next year. The first of these expansions, Entrenchment, is currently being developed and will be available in late 2008 for $9.95. This expansion is said to add new weapon upgrades and defense platforms. Two other…