Penumbra: Necrologue [FULL RELEASE]

[Romulator]

I'm stuck at the chemical puzzle, can any one give a hint on what to do?

You need to mix SO3, Trg and water in the chemical bottle/jar, which is near the gas container, just a few steps before the "classroom" doorway is.

*clap clap clap*

Now I know this already....

Wouldn't call it a spoiler.
Not unless you reveal something story related.
Such as the part where

Spoiler below!

Made you look.