Circuit Board-
From where you begin, run forward and drop into the water. Swim forward and then surface at the next hole and climb up onto the platform. Now, take out the Dog and the three Goons that appear and run into the room on your right. When you enter the room, the doors will close and you'll be trapped inside. Now, head forward and run up the staircase to the top and activate the switch on the wall closest to the pool of water below. Once activated, turn to your right and then shoot out the windows of the room and drop to the ground below. Now, turn to your right and run up the next staircase and follow the hallway to the end. Activate the switch on the wall and then turn and enter the door on your right. Now, run forward and drop to the ground and then head to the left and make the next right, into a wide hallway. Follow the hallway all the way to the end and then jump over the metal platform and into the darker part of the hallway. Enter the door that opens on your left and then activate the switch in the room. Now, run into the door that opens outside on your left and then head outside. Run over to your left and climb up onto the roof of the building on your left. Keep climbing up, heading to your left, and then jump across to the building across from you. Head into the short hallway on your right and then activate the switch on the wall. Now, enter the door behind you and grab the Circuit Board from the floor.

Card Key 1, #1-
From where you found the Circuit Board, leave the room and then run forward all the way into the far, upper room. Place the Circuit Board into the slot next to the door and then enter the open door. Run into the dark cargo warehouse and then watch out for the Snowmobile Goon and head to the far-left corner of the area. Now, jump up onto the crates in the corner and grab the Card Key 1 from the crate.

Card Key 1, #2-
Once you have Card Key 1, turn around and leave the cargo warehouse. Now, run outside and quickly get on the Snowmobile and take out the next Snowmobile goon that attacks you. Now, drive your Snowmobile along the roofs of the lower buildings and jump in across to the small room across the gap. Now, carefully drop to the ground and then take out the next Snowmobile Goon motoring around. Then, head over to the door with a star marking and use your Card Key 1 to open the door. Now, head into the new room and then drop into the next room to find another Card Key 1.

Card Key 2-
After grabbing the second Card Key 1, head into the far room and pull the switch on the wall. Then turn around and head into the previous room and shoot the Goon that appears. Then grab the Card Key 2 that he drops.

Completing the Level-
After grabbing Card Key2, head back into the room behind you and use Card Key 2 to open the door. Now, enter the door and follow the path into the next area. Head over to the left and then follow the rocks to the right and enter the building. Watch out for the rolling barrels and then take out the Flamethrower Goons in the next room. Once dead, head to the left and drop into the dark pit on your left. Use your Card Key 1 on the lock and then turn around and dive into the water. Swim into the next room and then climb up into the room and enter the hallway opposite the big doors. Run forward to the wall and then follow the path to the left. Head into the big cavern and then jump across to the rock on across the way. Grab onto the edge of the rock and then pull up to the top and drop onto the narrow ledge on your right. Walk over to the bones on the ledge and then turn to your left and face the wooden wall. Jump forward and then grab onto the wall and make your way down to the bottom. Now, run forward and slide all the way down to the bottom. Run around the room to the left and then enter the lit hallway to complete the level!

Secrets -

Gold Coins-
From where you begin, run forward and drop into the water. Swim forward and then surface at the next hole and climb up onto the platform. Now, turn to your left and run up the next staircase to the top. Follow the hallway to the end and then activate the switch on the right wall. Turn around and then follow the hallway back to the open door on your left. Enter the small crate room and then run forward to the crate opposite the opening into the room. Pull that crate back three times and then head to the left and jump up into the opening on your right. Head to the right to find the crate again and then pull it back once. Now, climb over the crate and enter the crate room again. Head over to the crate on your left and then pull it back once. Finally, run around to where the crate was to find the gold coins!

Gold Bars-
Once you have Card Key 1, turn around and leave the cargo warehouse. Now, run outside and quickly get on the Snowmobile and take out the next Snowmobile goon that attacks you. Now, drive your Snowmobile along the roofs of the lower buildings and jump in across to the small room across the gap. Now, carefully drop to the ground and then take out the next Snowmobile Goon motoring around. Then, head over to the door with a star marking and use your Card Key 1 to open the door. Once the door opens, don't enter it. Instead, turn to your right and run back through the doorway and into the previous room. Now, head to the left and into the alcove and head to the right. Follow the dark passage to the end and then head to the right and climb up onto the high ledge. Run forward and activate the switch on the wall and then turn to your left and run forward, through the open door. Finally you can now grab the gold bricks on the floor!

Gold Skull-
After grabbing Card Key2, head back into the room behind you and use Card Key 2 to open the door. Now, enter the door and follow the path into the next area. Head over to the left and then follow the rocks to the right and enter the building. Watch out for the rolling barrels and then take out the Flamethrower Goons in the next room. Once dead, head to the left and drop into the dark pit on your left. Use your Card Key 1 on the lock and then turn around and dive into the water. Swim into the next room and then climb up into the room and enter the hallway opposite the big doors. Run forward to the wall and then follow the path to the left. Head into the big cavern and then jump across to the rock on across the way. Grab onto the edge of the rock and then pull up to the top and drop into the dark alcove on your left to find the gold skull!