Companion Cube Pin
- [Undocumented] The Companion Cube Pin was added to the game.
- The Companion Cube Pin was made Gift Wrappable.
- All players who earned the Companion Cube Pin via preordering Portal 2 had their pin upgraded to Genuine Quality, and it became tradable.
- Added the Limited attribute to the Companion Cube Pin.
- The Resurrection Associate Pin uses the same model as this item.
- Four Vintage Companion Cube Pins were given to play-testers of Portal 2 at PAX 2010 prior to the item's official release.
- A fifth Vintage Companion Cube Pin was awarded to another player for unknown reasons.
- Player Vulcnor, upon winning a charity auction for Child's Play, received a Unique quality Companion Cube Pin.
- Team Fortress 2 - Companion Cube Pin
- "Thanks, Valve! (Or "Why Valve is fucking awesome.")", post by Dacvak on /r/gaming on Reddit, November 30, 2010.
Items link: https://www.tf2items.com/item/186915291, https://www.tf2items.com/item/759172489