Mystery Check Point
“Mystery Check Point” was a quiz game about the story of Tower of Terror that was added to TOT1899.com on September 21, 2006. Answering every question correctly unlocked an original wallpaper.
Although some screenshots from the time still survive, no complete record of the full quiz text has been found, so I was unable to recreate the game on this site.
The original wallpaper awarded for completing the game, however, can still be found in places such as the Web Archive, so try looking for it.