Stardock announced today that Entrenchment, the first expansion pack for Sins of a Solar Empire, has been released via Impulse digital download platform. Sins of a Solar Empire: Entrenchment features a Starbase defense platform for each race (extremely powerful and armored bases housing a variety of weapons and other upgrades capable of defending an entire planet). It also features turret upgrades for each race to make them more powerful (not only stronger than the current versions, but also upgradable with long-range weapons), mine fields and a Subspace Inhibitor platform that will slow enemy ships within its range.