Siblings and Sorcery

 a limited-time questline released on June 26, 2019. It the main questline of Act 3 of the Game of Games 2019 Event, progressing through it  all of the event's personal prizes. It succeeded by a short outro quest Siblings and Sorcery Outro.

End
Unlocks Marching Band Arcade.

End
Unlocks Dash Dingo.

End
Unlocks Guts of War Statue.

End
Unlocks Furious Fliers.

End
Unlocks Report Card.