[SPOILER] What you think about red?

[Thaliur]

Well, miner's outfits are quite sturdy (they have to be I guess), but 30 years is fairly optimistic.

A boss fight wouldn't fit into Penumbra, I think. This is more a part of combat-oriented games, which Penumbra doesn't belong to.
And they're unrealistic in my opinion.
Penumbra is still very realistic, despite the strange artifacts and mutated animals. It could happen.
But there just isn't any reason why each series of related events should end with a significantly hard battle (*insert suspicious glance at Half Life and several other games here*)