it's because this was transferred from FHv2, which was done in HTML code as apposed to our current vB code format.
Dude I've played this in HL2, the part is probably one of my favorite parts in the whole series! You made a great remake of this map, it looks exactly like it, atleast from what I have seen in Version 1! I am going to give you a 5/5 for having such great accuracy of what it looks like in HL2!
love this part in half life and it looks like a lot of fun but maybe make a V2 to make it a little bit better cover wise for the tunnels-5/5 DLing NOW!!! EDIT: everything works perfecto. Best map so far with a half life theme. Maybe you could make the zombie town from half life 2 with the traps and stuff? Keep on Forgin'