Half-Life Forums

Lowerd health hev suite:
when u start on the tram wait till it stops.......
next when it stops crouch down and crawl into the lower window of the door when it opens u get hurt but will not die unless u wait a very long time.
and when u get hev u will start with a lower health than normal
the invisable security guard:
when u are in the chapter office complex got to the door block by wood that u have to smash make sure that the headcrabs and vortaguise are dead DO NOT break the wood instead go back to the last security guard u met and push him to the locked door and it will open go through and the guard that should be there is not walk to where the guard should be and you'll be stopped press the talk button and he will talk to u! shoot the floor near his "ghost" and u will start being hurt and u can't kill him!
the mysterious pool of blood:
on the office complex when ur close to the elivator do not go in the hallway instead stay right outsid the hall and shoot the alien on the high platform till he's dead now walk in and all of a sudden blood pops up out of noware on the floor!
incorrect dialog:
before u go into the test chamber to start the bad experament push one scientest right into the door and when the experament is done talk to him and he'll be complaning about how u did not do the experament yet!