Bonus content can be enabled from the Cheat Menu. To open it you need to press CTRL+SHIFT+TAB and then CTRL+C and wait a couple of seconds (cursor will be inactive). In the Cheat Menu select Flags tab and search for bonus. Double click on BONUS_FL option in search results (an X will appear near it).

On the same Flags tab in the Cheat Menu search for games. Double click on CELLPHONE_ENABLE_GAMES and UI_CELLPHONE_GAMES_L... options.

The Special Edition Bonus content adds:

• Two mini games on nancy's phone: Land Rush from Nancy Drew: Trail of the Twister and Double Take from Nancy Drew: Warnings at Waverly Academy.
  
• An additional award at the end of the game for playing the phone games a lot.
  
• Extra avatar items.
  
• Three extra Suki's tricks: Totte Koi, Shizukani and Oyatsu.