Microsoft has announced two new additions to Xbox LIVE Marketplace.  Two Xbox Originals, Destroy All Humans! and Intellivision Lives!, will be available for purchase on September 15 -- this upcoming Monday.

In Destroy All Humans!, gamers take on the role of Crypto, an alien warrior sent to clear up Earth and prepare it for the Furon invasion.  As a one-alien conquerer, players get to choose from a wide arsenal of B-movie inspired weapons.

Intellivision Lives! is a flashback to the 1980s, the era of terrible fashion and music (the latter is debatable).  It has over 60 games from the classic Intellivision console, along with interesting facts about each game, interviews with Intellivision developers, and old footage and commercials.

Both games currently have a set pricetag of 1200 Microsoft Points, or $15 each.