After retrieving the GATE CONTROL KEY, exit the building and the cages outside. Turn left and go around the cages...

...to find another ice tunnel with a shallow pit about halfway along. Enter with weapons drawn and kill the man lurking at the other end.

Continue through to emerge near a WOODEN BRIDGE SPANNING A PIT. The husky down below is guarding some grenades. Shoot it from above. Then climb down the ladder next to the bridge to get the goodies.

Climb back out of the pit and cross the bridge.

Continue forward to emerge back at the ELEVATED FUEL TANK. Approach the green building with the RX-Tech sign, turn left...

...and go through the dark passageway back to the first part of the compound.

As you exit the dark passageway, the TOWER WITH THE RX-TECH LOGO will be on your right. Continue straight ahead into the ice tunnel that will lead you back to the water.

At the end of the tunnel, jump up the slope on the right. Then grab the monkey bars and swing back over to the GATEHOUSE where you left your boat.

Go around front and use the CROWBAR to pry open the padlocked door. Then go inside. (This time it doesn't matter if you pick up the crowbar after using it, since it disappears from your inventory at the end of the level.)

NOTE: If you're missing the crowbar or the GATE CONTROL KEY, you'll need to go back for them now. See the main walkthrough for details.

When you enter the GATEHOUSE and approach the keyhole, another red-jacketed guard appears outside and comes around to the doorway. Roll...

...and take him out.

Then use the GATE CONTROL KEY in the keyhole to activate the gate mechanism and press the button...

...to raise the gate on the other side of the channel.

[Part 5 | Part 7 | Return to the Antarctica Walkthrough]