The Deadliest Duckling is a promotional cosmetic item for the Soldier, Pyro, Demoman, Engineer and Sniper. It appears as a rubber duck with a black trilby, a matching suit, and a tie. The Duckling either sits in the pockets of the Sniper and Engineer, or replaces the Pyro, Demoman and Soldier's grenades.
The item comes in two styles, named "Capone" and "Luciano". Luciano, the second style, removes the suit.
- The Deadliest Duckling was added to the game.
- [Undocumented] The Deadliest Duckling is now tradable, giftable, craftable, and available at Mann Co. Store.
- The item itself is a reference to the rubber duck that is hidden as an easter egg in every Hitman game and many of the subsequent promotional images for the games, even making a cameo in the film adaption. The first appearance was in the first game in the series, "Hitman: Codename 47", where in order to get a mental patient to help you locate the TV room of the hospital, Agent 47 must first retrieve their rubber duck for them.
- The names of the Duckling's styles refer to two famous mob bosses during the prohibition era, Charles Luciano and Al Capone.
- The description of the item references the scene in The Godfather in which Jack Woltz finds the head of his horse in his bed.