47's Best Disguise

[+18, NSFW]

I had this idea for the LOOOONGEST time, and playing through the current Hitman trilogy really sold the idea more to me. You really have to have a suspension of disbelief when playing the Hitman games, especially since Agent 47 can wear literally any disguise and can magically have the skills of a professional brain surgeon/sushi chef/runway model/town shaman/rock drummer, and many many more.

SPOILER FOR HITMAN 3:
Even in the most recent installment of the game, he disguised himself as a Private Investigator, and the game had worked around that disguise so that you would have to solve a murder mystery. Insane. Fun.

And naturally, my brain had worked its magic, and said "How can I make this weird?"
The answer has always been there XD A disguise he can wear, and that disguise giving him skill buffs he never knew he never wanted.

Just to make this even more fun, I'm gonna put out a discount code in a form of a trivia question.
In the modern Hitman trilogy, there is a level where you attend an annual event, where everyone (guests, staff, security, higher ups) all wore masks. What was the name of this level's mission? Put in the answer upon checkout (one word) to get 50% off discount, available for the first 10 to answer it!

PLEASE DO NOT REPOST MY WORK! THANK YOU!