I am very happy to report that not only was the Adeptus Mechanicus successful in stomping a mudhole in the Triarch Praetorians, but we also condemned Lord Ekropis the Astronomer to the cold dark void which is the rightful terminus of xenos and heretics alike.
Special thanks to @coin for actually making use of Shadowchat today, which was a very pleasant surprise. I do agree that some kind of audio notification might be a good idea... I don't know if that's something that can, or should be incorporated into the program itself, or if it's better off being left up to some kind of browser plugin (and I should probably ask @greyarea for some input on this).
Next Saturday will be Alien Isolation, with more Mechanicus the Saturday after that (May 25th and June 1st) respectively. June 8th remains open, but I am aware that June is Pride Month, so I'd like to cook up something special for that. Maybe something in GMod since it's been a while, or I have a shitty idea I can rig up in Shadow of Doubt, given all the "non-binary" NPCs in that game... though the fact that it suffers Unity crashes every 30 minutes or so makes that tricky...
Anyway, thanks again to everybody involved for a very pleasant evening.