As part of the increasingly expansive Haunted Mansion 50th Anniversary celebrations, Disney has announced that guests can earn some special, limited-time Play Disney Park app achievements at Disneyland park.

When you “foolish mortals” use the Play Disney Parks app and ride the beloved attraction at Disneyland park during select times this month, you will have the opportunity to earn new limited-time Haunted Mansion achievements! Collect the entire set and unlock the Haunted Mansion 50th anniversary achievement.

From now until August 10, your limited-time Haunted Mansion achievement will feature Sarah “Sally” Slater, a delicate young girl, who can be found inside the portrait chamber of the Haunted Mansion balanced on a tightrope, as if from a circus.

The achievement from August 11-18 features Madame Leota, who floats in the dead center of the séance circle, calling out for “serpents and spiders, tail of a rat,” to bring about the happy haunts.

From August 19-24, you can earn an achievement that features a watchman of the Haunted Mansion and his dog. You can find the watchman outside the open gates of the cemetery, with his knees quaking in fear and his scrawny dog quivering in terror.

If you collect all three in the app, happy haunts will materialize as you are issued a fourth, special 50th Haunted Mansion anniversary achievement.