I think the first time I played it was like 1:45 total, over the course of a couple of afternoons. I can beat it in around 30 minutes flat now. 12 minute speedruns are possible. :D
It's not done in one continuous session, but segments were done in a two-year period and the separate demos were joined at the elevators between the chambers. But it's still a very nice achievement indeed:)
Yes, that's what I was referring to. I know all about it. I downloaded the insane quality one over the period of a week or so, because the stupid uploaded .torrents, and nobody was seeding :<
Even if it's segmented, it doesn't change anything imo. Still insane.