just finished getting all the trophies for this and it is a wicked game.
not amazingly scary at times but it has the eerie atmosphere, and chapter 10 is my favourite the sound goin in the background just after the tram…
oh and for the zero g basketball, you need to get to level 6, just go on the 1st platform by the door after you've got the nav card and rid it of enemies, and then just make sure your on one multiplier platform on each level and you should be able to do it, and i think the zero-g b-ball explains everything else you gotta do.