The Amusement Park of Doom Update Title update for Crusaders of the Lost Idols has 4 achievements.
Complete the 'Log Ride' objective by beating area 650 in the 'Amusement Park of Doom' campaign
Complete the 'Mauled By Mascots' objective by beating area 750 in the 'Amusement Park of Doom' campaign without hurting any beloved characters.
Complete the 'Couples Day' objective by beating area 800 in the 'Amusement Park of Doom' campaign with an equal number of males and females.
Complete the 'It's Over Nine... Hundred?' objective by beating area 900 in the 'Amusement Park of Doom' campaign. That's it.