There're several small glitches, none of them wholly critical, but covering a wide spectrum of influences and causes (ranging from e.g. the ALT+TAB and windowed mode issues, to more convoluted ones like MP lag not mitigated by any de-jitter buffering), that could certainly make the state of preservation of these gems somewhat poorer than what they would deserve in my opinion.
Forthcoming games by Norbsoftdev are going to be equally praised, no doubts.
But in the meanwhile, please let these ones open their way to immortality just a little bit easily, boss!
I really speak from the hearth.
SPOILER: SHOW