Perfect Dark

Two guards at the base of the staircase have keycards. Get them and open the doors on both sides of the room for the Cyclones.

Once you have gone into the first elevator (that moves diagonally), go down the corridor. There should be a computer with words scrolling down it. If you blow this up, the lasers in the big square hall should malfunction and flash on and off, allowing you pass through. Kill the guards first, as they will shoot at you and push you into the flashing lasers.

For this to work, you will have to give a little bit of your health. After the intermission sequence featuring the scientist turning on the gas, they die. However, what it did not show was that one of the scientist dropped two Falcon 2 scoped pistols. To get to them, you must go through the doors, get the guns, then get out.

If you manage to put Elvis in the hiding place in less than 36 seconds, you will see an ammo box with the three mines.

Go back in the operating room. Next to the fumigated surgeons are the guns. Make it quick though, or you will end up like them.

Behind a fence near the tunnel to the place you place your comms rider will be a Rocket Launcher. Throw a grenade to blow up the mines near it. You can also use the small crawlspace.

When the conversation about who will be left behind to open the hanger doors begins, immediately go to one of the consoles that open one of the hanger doors. Doing this will prevent Joanna from volunteering for the job. Keep pressing B until the console message says "Outer hanger door open". Quickly run to the other console and press B again. The level will then be completed -- you will not need to get on the hoverbike and escape, and a lot of time will be saved. The key to doing this in time is to quickly initiate the conversation with Jonathan and Elvis.

Go up the first elevator and turn right. Go to the locked door and wait awhile. A man will open it. Follow him to the elevator. Go up the elevator and keep going through the doors until you get to a large, brown room. Look around to find a bench with the phoenix.

Instead of going through the trouble of taking the crate to the X, get a Dragon, throw it near the X, and shoot it. You will not be injured if you are far away, and it saves time. Do not shoot the crate at the beginning, or you will fail the mission.

There is another way to get through the wall in the Area 51: Rescue mission without using the bomb crate. Throw your Dragon onto the ground with the proximity self-destruct on. Back away and use you pistol to blow up the gun, causing the way to break open. There will be another, more powerful, gun once you get inside.