Objective 2 : Plant explosives on the generators.

First up, head into the dam itself. You'll see a small enclosure on your left with a door. Go through it and hop onto the elevator. Press 'F' near the switch to head down. Get your Sten ready, because it's going to get crowded down there. As soon as the elevator stops, you'll need to take out about three German soldiers in the immediate area.

Once they're down, move through the hallway and into the next room. Three more Germans will rush you from the far side, so gun them down quickly. There are some health packs on a table in this room if you need them.

Continue out of that room and down the hallway. You'll find more enemies near a table in the next room, and another one will appear just beyond it. Take them out, and then when you reach the stairwell, you'll see another three Germans waiting below. Rifle them down.

Head down that stairwell. As you approach the turn that opens into the generator room, a couple of Germans will pop out from both corners. Have your machine gun ready for this. Now, look up to the balconies ahead. Use your Scoped Kar98k to take out the snipers up there, then make your way to the next stairway in front of you.

Shoot the two Germans waiting at the bottom of this next stairwell, then head down the corridor to your left. Three more Germans will come around the corner – deal with them. After that, you'll face another group of three. Clear them out to reach the next elevator.

Ride this elevator down and get your machine gun ready again. A large group of Germans will be waiting for you at the bottom of the next stairwell. After you've dealt with them, move to the right and switch to your Kar98k. Snipe the German soldier at the end of the hallway, then switch back to your machine gun to take out the two enemies at the top of the stairwell on the far end. Clear out the Germans in the next couple of rooms; they shouldn't give you too much trouble, and you'll soon arrive at the generator room.

There are about four Germans inside the generator room. One will be by the door on the far side, two will come up on your right, and another will enter through the door shortly after you start firing. Plant the explosives on the generators as soon as you can, then make your way out through the door.