I heard that one guy played it once and his face melted like the nazis at the end of Raiders.
In other news, I guess I'm finished. Still tweaking a bit of voice acting, but other than that I think I'm throwing in the towel in terms of detailing. I'm right back on the AllocBlock limit (Although many thanks to Trempler for assistance there) and I'm reasonably happy with how it's looking.
Incidentally, I didn't use any direct references, but I was mainly thinking of HL2: Episode 2 when it came to designing the bunker interior.
I'll try to schedule a playtest this weekend.