Here is the full list of all 16 Open Roads achievements.
Finished packing Tess's room.
Dug around in the trash.
Refrigerated the whole house.
Found the secret in the attic of Helen's house.
Annoyed Opal in the car.
Listened to a numbers station.
Completed the first car journey.
Found a photo of Opal as a roller-skating waitress.
Found August's childhood friend.
Explored the trailer home... I mean, mobile home.
Ate the whole burger meal.
Found Opal's pills.
Stayed overnight in a motel.
Completed the second car journey.
Explored the houseboat.
Completed the game.