It look a little longer that first anticipated but today developer Ironclad Games and publisher Stardock have finally released the first of three planned "micro-expansions" for their best selling 2008 space strategy game Sins of a Solar Empire. The expansion, titled, Entrenchment, is available exclusively via digital download from Stardock's Impulse service for $9.99

As we have reported before, Entrenchment is all about adding defenses to your space fleet including space mines and the building of huge star bases to protect your fleet and entire planets. The second micro-expansion is expected to add more diplomacy features to the main game while the third expansion is a secret for now.