A single level solo scenario. You wake up in a strange room, with a magnum that shoots pfhor bolts instead of bullets... flow is good, the level is hard, and generally, completion is possible.

Produces an amazing array of info about a map (or a folder full of maps), including all basic stats (polys, floor space, weapons availability, textureset, etc), and some aggregate stats on multiple level maps. It was inspired by MapInfo, but generates much more information. This update is a complete overhaul. There are statistics on new things (including textures, lights, liquids, and sounds), and special value statistics, and the source is completely Loren's (all of Kirill Levchenko's code has been replaced). Source is included.

The closest anyone's ever come to a cutscene level. Pretty astounding, even given the limitations... play it to see what it's all about. (It's cool. Really cool.) The author gives permission to incorporate this into your scenario, and even offers to customize it for you. Amazing what he thinks of...

Hastur's Workshop, at Double Aught's site, has long been a source of inspiration and answers for marathon mapmakers intent on a better product. Michael Watson decided to preserve those pages in an offline form, in case they are ever removed from Double Aught's pages. (I think as an offline source of mapmaking tips, they're useful enough as they are, no need to justify them as historical.) Comes with a bonus Bungie Forge/Anvil FAQ v2.0.