: Considering how long bungie have been working on Halo, and it ships with what
: is essentially only seven solo maps produced over four years plus, I think
: each time the question was asked they removed all the map between two
: checkpoints >)
If you read the XBN article from the current issue, you'll see that your time line is a bit off.
The VAST majority of the time spent working on Halo was spent crafting the engine. As of February 2001, there were ZERO complete levels built - Jaime Griesemer was working on the prototype level.
Halo, as it exists today, took about 18 months from start to finish - though, of course, some things went faster than they would normally have because they'd been done before by the team, for previous iterations.