My last pass at Area 51: Infiltration was probably the most disastrous yet. Here we go:
At the beginning of the level, there's a slightly exploity thing you can do. In the opening cutscene, there's a guard shown patrolling around your spawn point. If you let the cutscene play for a few seconds before skipping it, the guard will have his back turned to you when you start the mission. However, the guard randomly decided to play an idle animation instead of following his route, so I started the mission with one guard right in my face and two others aware of my presence when they otherwise wouldn't be. I drop the first guard quickly, but one of the others decides to lob a damn grenade at me. From two feet away.
Now short of a grenade that would have been really helpful, I blunder straight into a disastrous firefight that costs me over a third of my ammunition and a noticeable chunk of my health. Following that, I lose another chunk of health and ammo in tight quarters with two assault rifle-wielding mooks. When all's said and done, I end up being killed in a minefield, which I usually avoid by using a grenade to blow up some of the mines. As in, the grenade that I missed out on from pure bad luck at the beginning. :T
Perfect Dark.