•: August 1, 2001 Mode(s) Treasure in the Royal Tower is the fourth installment in the series. The game is available for play on Microsoft Windows platforms. It has an ESRB rating of E for moments of mild violence and peril. Players take on the first-person view of fictional amateur sleuth and must solve the mystery through interrogation of suspects, solving puzzles, and discovering clues. There are two levels of gameplay, Junior and Senior detective modes, each offering a different difficulty level of puzzles and hints, however neither of these changes affect the actual plot of the game.

Tinlicker Remember The Future. The game was loosely based on a book titled (1995).

Treasure in the Royal Tower (3D Interactive Mystery Game): Software. Nancy Drew Treasure in the Royal Tower Mystery 4. [Old Version] Encore.