An 8-level solo scenario, 5 net maps, a passel of physics models, and some films. This is a truly impressive piece of work, with very well-crafted levels, fantastic term and chapter art, and a load of cool features. It is also the first scenario specifically designed for cooperative play. In fact, it's so well-suited to coop play that it's extremely difficult as a solo map. (You may have to drop one or more difficulty levels off your normal playstyle in order to finish it, and you'll be cursing the low number of save terms, which wouldn't bother you at all in coop play.)