Alas, 'tis the last we shall see of the wondrous airboat.  But ne'er fear, for there is a replacement, which is even more iconic to the game: the gravity gun!  The zero-point energy field manipulator truly is a wondrous thing, and unlike the airboat (and the awesome gun it's now equipped with) will be with us the rest of the game.  Join Gordon Freeman as he enters Black Mesa East--and then Ravenholm, a location that's probably even scarier than its name sounds.