StarCraft: Brood War/Terran Mission 7: Patriot's Blood

First Half
You start at a scene with 9 Marines, breaking down a door which the Stukov's Elite Guard had locked. Depending on whether you are lucky or not, you will have either one Marine die or have all of them survive. Once the room is clear, you will get Samir Duran and 2 Medics. You can then rescue those Marines that are lined up.

On your way to Stukov, you will find numerous floor traps (which are detectors) along with many marines for security. The computers will locate different locations, such as the area with Goliaths, and the area with Alexei Stukov.

When you get to the place with Goliaths, you can bring a Marine to the Goliath to enter it. (By the way, your Marines don't really enter; the game just removes the Marine once the Goliath turns white). If you are a skilled player, you may be able to Stim Pack a Marine to the Goliath and have him come back without getting him removed. You can then rescue the Goliath to use it. But beware; the enemy's civilians can also use those Goliaths against you.

Later on, you will come across a civilian next to an SCV to repair any of your damaged Goliaths. Just walk further, and you will come to a door which only Samir Duran can unlock. After a long pause and discussion, Samir Duran will escape after killing Alexei Stukov.

Second Half
Once Vice-Admiral Stukov is dead, all of his men will become rescuable, and all his floor traps will serve you. You can go back and rescue some enemies you haven't killed, but there will be some Zerg there now to fight you. You now have 15 minutes to escape to the override terminal.

This is the tricky part- do not be tempted to rescue every living man in the installation; just gather up to 2 groups of Marines and have your two Medics with you. You will eventually run into a room with many Zerglings; just do a hit-and-run technique as the gun traps will destroy them. The next room will bring on two infested terrans. If you do not want to risk everyone being killed by them, just send one Marine to be sacrificed; you probably have a lot by now. The next area will have a few more marines and lots of Zerg. Just make sure all of your guys are actively fighting, or have about 2 groups of Marines (with at least two Medics) flee the scene.

You will get plagued later, so make sure at least one of your guys are able to make it. You need your Medics more than ever here; if your Medics happen to be plagued, use restoration on them first. Anyone is welcome to get to the override terminal.