Rollerback

The Rollerback is a machine in Horizon Forbidden West.

Appearance

The chassis and overall structure of the Rollerback resembles a Pangolin. Its back is lined with metal plates, as well as its bulky, club-like tail. In its neck are adhesive sacs it uses to spit adhesives and in its back are four resource cores. A container-like object hangs from its belly, somewhat like the cargo container of a Behemoth. On the backside of its back, there is no plating, revealing two cooling cores above the top and a massive gravity magnet. It has four thrusters, one pair on the back end, near the generator, and the other midway from the tail on the top. It has Acid Canisters on the bottom of the tail and a big, hammer like mechanism at the end.

Behavior

True to its name, the Rollerback is capable of rolling into a ball, and flattening anything in its path, leaving a trail of fire behind. Using thrusters around it body, it is capable of propelling itself forward, into the sky and also gravel the ground as attacks. The Rollerback Gravity Generator allow it to magnetically recall all torn off armor pieces back to itself as well as magnetically attack its cargo container to its stomach if the crate holders have been destroyed. The later is done only when it feels safe and not during combat.

Abilities

Rollerbacks are able to roll themselves into a ball and propel themselves with its thrusters, allowing to move around and turn quickly, and even jump into the air, spinning fast, and crashing into a threat. It can also spit adhesive agent onto enemies to slow them, allowing it to roll on them or hit them with its tail easier. If an enemy is behind the machine, it will strike with its tail or activate its thrusters to burn anyone behind. It can also use its gravity generator to manipulate its plating, launching it at other enemies and reattaching it after its launched or torn off.

Weaknesses

The Rollerback can have its adhesives destroyed to prevent it from spitting, and ripping off its tail prevents it from attacking with the tail strikes. Doing enough damage to the generator will cause a massive explosion, destroying the generator and blowing off some armor plating, preventing the Rollerback from manipulating its armor. Like the Behemoth, the claw holding the container can be shot off, allowing the crate it was holding to be looted.

After using its thrusters, they will overheat temporarily, making them more susceptible to damage.

Attacks

Name	Windup Time	Stance	Damage	Damage Area	Trigger Range	Description
Burndozer	Medium	Rolling	250 Melee Crushed 17	15/s 15/s buildup	10m - 26m	Rolls into ball and uses Thrusters to move at high speed, generating a trail of residual Fire damage areas. Can turn and chain up to three rolls or transition into Gravel Spray attack.
Mega-Crush Hammer	Short/Medium	Grounded	265 Melee Crushed 17	-	10m - 26m	Raises tail and slams it down up to three times, generating a shockwave and a Tremor effect.
Sweep and Launch	Short/Medium	Grounded	200 Melee	-	10m - 20m	Tumbles towards target and swipes with tail as it uncurls. Can follow up if it misses.
Hammer Swing	Short/Medium	Grounded	200 Melee Crushed 17	-	10m - 20m	Spins 360o while swinging Hammer Tail. Keeps spinning two more times if it misses, and enters a knockdown state if it misses every swing.
Blast Off	Short	Rolling	300 Melee Crushed 17	-	12m - 27m	Revs up by rolling in place and using Thrusters to blast upwards towards target before slamming down. Impact generates massive blast and spreads shockwaves. Can repeat up to three times.
Adhesive Shot	Short/Medium	Grounded	100 Ranged 100 32 buildup	10/s 5/s buildup	9m - 39m	Stands on hind legs and spits up to three globs of Adhesive, exploding on impact and leaving residual Adhesive damage areas. Often follows up with Burndozer or Blast Off after inflicting Slowed state.
Gravel Spray	Short/Medium	Rolling	36 Ranged/hit	-	14m - 34m	Spins in place while boosting with Thrusters, kicking up a stream of debris towards target.
Thruster Burst	Short/Medium	Grounded	286 114 buildup	15/s 15/s buildup	5m - 21m	Ignites Thrusters and unleashes a flaming blast behind it, covering the ground in residual Fire damage areas.

Components

Loot

Variants

Variant	Weakness	Strength
Rollerback	Acid	Frost Shock
Apex Rollerback	Frost	Acid Shock

Gallery

Aloy dodging multiple attacking Rollerbacks

Rollerbacks grazing

Concept art by Miguel Martinez

Concept art by Miguel Martinez

Concept research by Miguel Martinez