The Exterminator outfit is a disguise that can be found in HITMAN™.
While wearing the disguise 47 can talk with the hotel manager and claim that he needs to inspect the Empreror Suite.This results in all NPCs temporarily leaving the suite and 47 gaining access until their return.
Jordan Cross will also leave the suite and move to the atrium. This allows the player to complete several challenges (Nutcracker; Oh Snap!; Oops! I Did it again!) than can't be done otherwise.
The disguise can still be obtained in The Source, but can no longer be used to gain access to the Empreror Suite. The backyard has also become a restricted area.
The Exterminator outfit appears in the following missions: