Hanging on the Combat Deck
Hanging on the Combat Deck is an achievement in Halo 4. It is awarded when a player wins 20 war games matchmaking matches. This achievement is worth 30 gamerscore. Hanging on the Combat Deck is represented by a sphere with '20' at the bottom.
On the web version of Halo Waypoint the achievement is erroneously referred to as "The Dongblainer." It is labelled correctly on Xbox LIVE.