Wowie! achievement in Monster Prom: XXL

Wowie!

What could this possibly be?

Wowie!-6.6
Gamer Gamer Date Won
SashaDarkCloud SashaDarkCloud 16 October 2020
USA ScraceHamlin ScraceHamlinhaha all my save data for monster prom is gone there goes 20 hours :) 20 October 2020
Lizard Man888 Lizard Man888 02 November 2020
Revan Seiei Revan Seiei 03 November 2020
rahabim87 rahabim87 04 November 2020
Canada Pursnikitie Pursnikitie 26 November 2020
England quiettime3 quiettime3100,000g - 1/9/16, 123,456g 6/3/17, 200,000g - 21/08/19 13 January 2021