To get the VIP keycard in Sons of the Forest, you must have the maintenance keycard, a rebreather, and an air tank. Follow these steps:

  1. Locate the bunker to the north of the lake, close to the Maintenance Keycard bunker.
  2. Enter the bunker and go down the path leading to the food and drink area.
  3. Use the maintenance keycard on the card scanner beside the double doors.
  4. Move through three rooms filled with hydroponic gardens and make your way to the swimming area of the bunker. You can also find the crossbow on the floor of the second garden room, between the planters.
  5. Keep swimming ahead until you reach a long hallway with an open doorway on the left.
  6. Enter the room on the left through the open door and continue swimming through the bunker to find a set of stairs.
  7. Climb the stairs to find a security room where the VIP keycard is located on the desk in front of the camera TVs. There is also an email to collect on the table to the left.

Other items you may find inside the bunker include a dress, an email and the crossbow.