Leave the Office.
Go to the Vortex lake hotel.
Enter the Hotel.
Notice the picture in the back room. Talk to the receptionist, he will give you two Keys. Go upstairs. Use Key #1 on Room #1. Look under the pillow, you will find a Remote. Turn on the hot water in the bathroom, notice the number on the mirror. Go right to leave the room. Use Key #2 on Room #2. Pick up the Toilet paper in the bathroom. Use the remote on the TV, you will get a Phone number. Go left to leave the room, go downstairs and leave the hotel.
Go to the souvenir shop.
Try to enter the restroom, the salesman will say you need to buy something first. Leave the souvenir shop and go left to get back to the map.
Go to the Vortex lake pier.
Use the phone to dial the number you have on the note (5559292). Go right to leave the pier.
Go back to your office and talk to Caroline, she will give you $4. Go left to leave the office.
Go back to the Vortex lake hotel and enter the hotel.
Take the picture of the lake monster off the wall and click on the safe. Enter the number that appeared on the mirror in Room #1 (1988), you will get a key.
Leave the hotel and get back into the souvenir shop.
Give the $4 to the salesman to buy a Lighter.
In the bathroom, through the Toilet paper into the toilet and then flush the water, the toilet will clog. Go left to leave the bathroom.
Talk to the salesman, he will go look for a plunger. Click on the fish on the wall to remove it and reveal a secret drawer. Use the Key on the drawer to open it and receive another Key and a note. Leave the souvenir shop and go left to get back to the map.
Go back to the Vortex lake pier.
Go left. Click on the boat. Use the Key on the keyhole. Enter the solution to the note you received from the secret drawer in the souvenir shop (18.104.22.168).
Once you get into the island go deeper into it.
Use the Lighter on the gasoline soaked skull, a secret door will be revealed. Click on it. The code is the picture in the back room of the Vortex lake hotel reception (UP,UP,UP,SQUARE).