Talk to the green penguin wearing the beanie and glasses standing outside the vault.
Keep talking to him until he tries to show you the door was secure. He demonstrates by closing the vault. It locks and he has forgotten the combination.
Go inside the office marked with the Staff Only sign.
Go all the way to the right until you get to the couch.
Click under the couch.
Pick up the floppy disk and the paper clip and put them in your inventory.
Go back to the left to the computer. Put the floppy disk in the disk drive and turn thecomputer on.
Click on My Files.
Click on combination_number.
The combination is different every time you do this mission. Remember the numbers for NESW. These letters are directions (North, South, East, West) and will map to the combination on the safe.
Go down stairs and enter the combination into the safe.
Go into the vault.
Click on the pile of coins on the roof.
You will get a call on your secret agent phone. G will ask you to meet him at the HQ.
Head back to HQ and talk to him.
Look at the video. Then go back to G.
Click on the drawer and pick up the gold key in the top left corner. If you bother to decode the messages on the keys, the one in the top left is the one that's labeled correctly.
Go to the office in the gift shop again.
Open the door to the roof with the key that you got from G's drawer.
Open your spy phone and get the spanner/wrench.
Open the box with the spanner.
Trow the paper clip in the box. It will cause it to short-circuit and turn the power off.
There is a piece of white fiber in the drain. Pick it up.
Go to the vault downstairs.
Click on the coins.
Go to HQ and give G the fiber that you found on the roof..
Go to the right. Pick up the flashlight under the map.
Go to the Town and talk to the brown penguin who is crying outside the night club.
Go into the club and turn on the flashlight, or if you have night vision goggles use them instead.
Go to the secret entrance to the boiler room. It is one of the speakers towards the right.
Find the fuse box and click on it.
Read the instructions that are inside of the fuse box.
You have to make all the lights green. Follow the instructions for this game. It can be a little challenging.
When you get the power on go into the night club and talk to the penguin that was crying.