Papervision 3d game - Meta4orce

From the BBC, Meta4orce is a interactive fiction by Peter Milligan and to support the fiction, one of the aspects to this site is a Papervision based 3d game in Flash. It is essentially TowerDefense done with 3d pieces. It is still 2d gameplay.

Very nice TRON look.

Update: Actually there a lot of Papervision based games... Here's Iain Lobb's blog entry that has more information about the different games and a description of a high-level approach.

Update #2: Here's a chat with Iain.