Half-Life
		You assume the role of theoretical physicist Gordon Freeman, who's a half-hour late for work at the Black Mesa Compound, a top-secret military complex similar to the U.S.'s Cheyenne Mountain. The game begins as Gordon takes the transit train to work, in one of the most enveloping intro sequences ever achieved---it's just like a ride at Epcot Center. The train chugs its way deep into the mesa, giving you an intriguing view of nuclear warheads, toxic spills, and scientists making their daily rounds. Once you make it into the compound and begin exploring your surroundings, you'll notice that you don't have a gun. In fact, everything seems normal for the first half-hour of gameplay; Gordon is simply another suit-and-tie government researcher, and it's just another day at the office. After locating his HEV (Hazardous Environment Suit), Gordon chats with several scients about the daily experiment, and heads into the test chamber to earn his paycheck. And then the crapola hits the fan. In a botched attemt to creat a "resonance cascade," Gordon is partly responsible for opening an interdimensional gate to somewhere--where the denizens are anything but friendly. After a delightfully disorienting disaster sequence, Gordon gains consciousness in the ruins of the test chamber, his comrades slaughtered by the extraterrestrial horrors that jumped through the fate and spread to every corner of the Black Mesa. Needless to say, things look bad. You're a good mile underground, the base is in tatters, and almost every means of escapeis bloocked off. A skelton crew of scientists and a handful of barely adequate security guards remain in hiding. If you escort these lab-coated geniuses around, they'll be able to open locked doors--and the security team will be happy to back you up in a firefight. Eventually the few friendly escorts you encounter will stay behind or be killed,leaving you behind with your HEV, your flashlight, and any firearms you've salvaged.