Call of Duty: Black OpsEdit
The Zipline Launcher is seen once in the level "Operation 40". It was used by either Woods, Bowman, or both to secure ziplines into the buildings ahead. The gun can be seen discarded on a nearby crate. While the weapon itself is not available to the player, the crossbow is used in a similar way in the mission "Executive Order", where Mason launches a zipline from it.
Call of Duty: GhostsEdit
The Zipline Launcher is used in the level "Federation Day". It is used by the Ghosts to infiltrate a skyscraper in Caracas. After identifying Victor Ramos with the Optic Scanner, the Ghosts jump down two levels where there are several zipline launchers. Upon nearing the building on the zipline, the cable detaches from the Zipline Launcher for rappelling down the skyscraper.