hi. i just finished this awesome game. late by a year i know:( but i
have two questions abt the game.

1) i watched the trailer of this game on gamer tv last year. i swear i
saw a bit where this huge tentacle thing comes in (bluish in color) and
sweeps a combine soldier off into a pit. i didnt find this anywhere in
the game. where does this take place?
2) i also saw, near the end, the giant tiger shark thing rush towards
me(ie gordon), in the trailer. this creature was nowhere to be seen in
the episodes i played.
3) the costume worn by alyx in different in the game i played where she
is waring a brown jacket and a jean. in the trailer she had a different
costume.

are these things different in various platforms? thanks y'all

PS: anyone know how to enable multiplayer? cos mine doesnt have that
option on menu