Nova Prospekt:
The first giant antlion encounter: Don't jump down to the bath area. Go all the way to the end of the walkway and use the pheropod. Walk back to the room where you started--repeat as needed. Eventually, the giant antlion will spawn in front of the walkway--the part shielded by chain link. The giant antlion simplys stands there and does nothing! Either kill it with small arms fire, or better yet, take the automatic turret and place it facing the giant antlion and save your ammo 🙂 I assumed this was a bug, or was it the "official" way to kill the monster?
Only other bugs I've noticed are dying after being crushed by apparently nothing, getting hurt by those flying saws through a solid wall(!) and video clipping.
BTW, isn't Alyx kinda young? If the protagonist worked with her father, I assume that he is more of a father figure to Alyx, unless he's a cradle robber! 😀