2011 · Shooter · PC (Microsoft Windows)
The Manniversary Update & Sale was a major update that included several new cosmetics, added a second miscellaneous slot (before hats and miscs. were Cosmetics), a new high-five taunt, and four loadout presets. All items bought via the Mann Co. Store before the update were made tradable, and all items bought after become tradable within two days of purchase. Players that logged on during the week of the update received a Manniversary Package.