Penumbra Walkthrough in PDF format
Entry 273 posted in: 3. Gamebits
Planetphillip (Commentary and Analysis of Sci-Fi Single Player First Person Shooters) were so kind to add my Penumbra Walkthrough on their site.
Of course they also have a 'regular' Penumbra page and that can be found here: Penumbra
If you liked this post - you might be interested in this one as well: Penumbra Overture Announced