Unlocked by completing Betsy's Challenge
Unlocked by completing Boxing Betsy's Challenge
Unlocked by completing Corporate Betsy's Bonus
Unlocked by completing Gabber Betsy's Bonus
Unlocked by completing Warrior Betsy's Challenge
Unlocked by completing Lifeguard Betsy's Challenge
Unlocked by obtaining the "RAGEQUIT!" achievement
Unlocked during Halloween
Unlocked by getting a bronze medal on all levels