Entitled Rocketmen: It Came from Your Uranus, the expansion will include three new levels, three weapons and two new subweapons, and a host of new enemies for the original game, which debuted on Xbox Live Arcade and the PlayStation Network earlier this year.

The expansion is priced at 400 Microsoft Points ($4.95), and is scheduled to hit the Xbox Live Marketplace on May 14 and the PlayStation Store a day later.