This droid patrols the immediate surroundings, scans for enemies, and attacks them on sight. The droid patrols a straight line while waiting for enemies to appear. Whenever enemies appear, they'll be scanned across a 360 degree angle, visible to all friendly players, with the addition of being fired at with an extremely fast blaster. Unlike the Viper Probe Droid, the R5-D4 droid has a much faster rate of fire, meaning that it can take down enemies within slight seconds. Also unlike the Viper Probe, this droid doesn't follow the player.