Kalypso Media today announced that Sins of a Solar Empire will feature four micro-expansions over the next year. The first expansion pack, Sins of a Solar Empire: Entrenchment is currently in development and will be released later this year via Stardock's Impulse digital distribution platform, for just £7.99. Sins of a Solar Empire: Entrenchment will feature 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), 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.