Zip Lines are cables suspended by a pulley that are designed to enable a user propelled by gravity to travel from the top to the bottom of the inclined cable by holding on to, or attaching to, the freely moving pulley.
- Main article: Crossbow
The zipline is launched via a crossbow, with an electronic sight that indicates valid targets. Upon successfully attaching to a object, a stationary pole is set up for the zipline to attach to on the player's end. The Zipline is the only projectile in the game to have no drop from gravity, meaning it will hit its target exactly at any range. The zipline can now be fired at an upward angle, but if it is fired upward it cannot be used from the player's end, and instead can be descended by players at the other end. The zipline has a range of approximately 150 meters. If the target is out of range, or at too steep of an upwards or downwards angle, the crossbow will not be able to fire. To use the Zipline, any player can press on the zipline pole, or alternatively, can jump onto the line at any point.
The zipline can be destroyed by shooting or hitting with a melee weapon either the line or the base. Also, it can be picked up by the player who fired it, by pressingat the base of the post. Unlike the zipline in Battlefield 2, it is possible to kill an enemy with the projectile, and it will take one to two hits to kill, similarly to a sniper rifle.
- Sometimes targets that appear to be out of range can still be reached with the line.
- Despite the fact it is a high powered crossbow with a large harpoon, the zipline cannot kill anyone. Shooting someone with the zipline has no effect. Removing a zipline resulting in a lethal fall for anyone on it does not count as a kill for the player. There is, however, localization for a kill via the zipline crossbow, which simply lists the cause of death as "crossbow".