missing scripts for me (#BMS_Intro_text etc) and just had my first engine crash! but been playing for at least an hour so fair play.
love the attention to detail, and it really brings back some great memories without straying too far from the original half-life. however i would have personally gone for a completely different look rather than just up-res-ing and beautifying HL1 levels. would be nice to see a completely new take on the BM facility, something to really stand shoulder to shoulder with Aperture labs.
that aside, this is enjoyable, very much so.