Post Easter Eggs! (Possible spoilers)

[Paulaner]

2. In Overture, when you get the crowbar from the glove (Corpse?) and look at it's description, it says "Probably handy if you're trekking through the tundra. There's a name etched into the side: 'Freeman'" which is a reference to the game Half-Life's main character, Gordon Freeman, whose trademark weapon besides the gravity gun is the crowbar.

In my opinion, the whole Penumbra experience has a strong influence from Black Mesa and Half-Life 1, which is a very good thing. When I talk about Penumbra with my friends I describe it as: Half-Life with puzzles and no shooting (and again, this is very good for me since I hate shooters)
Developers, can you confirm this? :-)