Modwatch Interviews: The Portal Prelude Team

From the article:
"Portal: Prelude has a very steep learning curve. I mean, we assumed that people who hear about this mod and understand what a mod is must have already played Portal. So there's no need for another couple of ultra-basic maps that ruin the length of the game. We started somewhat fast and I'd recommend players who haven't played Portal since the first one came out, to play it again a few times to remember the basics."