Roll Rat

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Aberration DLC.jpg Valguero DLC.jpg This article is about content exclusive to the DLC: Aberration, Valguero
Logo Steam.png Logo Xbox One.svg Logo PS4.svg This article is about content exclusively available in the version on Steam, Xbox One, PS4.
This creature, item, or feature is not yet released in the version on Nintendo Switch.
Roll Rat.png
Roll Rat
These values may differ with what you see in-game or written elsewhere. But that is what the dossier says.
Common Name
Roll Rat
Heterocephalus magnus
Time Period
Logo Steam.png 275.0
December 12, 2017
Logo Xbox One.svg 768.0
December 12, 2017
Logo PS4.svg 518.0
December 12, 2017
Spawn Command
admincheat summon MoleRat_Character_BP_C
admincheat SpawnDino "Blueprint'/Game/Aberration/Dinos/MoleRat/MoleRat_Character_BP.MoleRat_Character_BP'" 500 0 0 35
XP For Kill
14 XP
Gestation Time
4h 57m 37.143s
Baby Time
5h 47m 13.334s
Juvenile Time
23h 8m 53.336s
Adolescent Time
1d 4h 56m 6.664s
Total Maturation Time
2d 9h 52m 13.328s
Breeding Interval
18h - 2d

Aberration Topographic Map.jpg
Spawning Roll Rat Aberration.svg

Valguero Topographic Map.jpg
Spawning Roll Rat Valguero.svg

Common             Rare
  Untameable   Cave

The Roll Rat is one of the Creatures in the Aberration-DLC of ARK: Survival Evolved.

Basic Info[edit | edit source]

Dossier[edit | edit source]

This dossier section is intended to be an exact copy of what the survivor Helena, the author of the dossiers has written. There may be some discrepancies between this text and the in-game creatures.


Bearing a strong resemblance to its relative, the Naked Mole Rat, Heterocephalus magnus is a gentle giant that digs for plants and fungi with its imposing front teeth. While foraging, it often uncovers precious resources inadvertently, but survivors should claim them with caution, as this triggers an aggressive response.

When threatened, Heterocephalus rolls up into a ball to shield itself with the armored plates on its back, much like an armadillo. It then rolls around like an oversized bowling ball, smashing through rocks, walls, and hopefully its aggressor.


While hardly a ferocious war beast, Heterocephalus is an effective transport that can carry up to three passengers. In theory, it could also be siege weapon, as its rolling attack can dent even metal. Fortunately, most survivors use a special saddle that deploys a protective canopy when it starts spinning, which not only keeps them from getting squished, but provides extra protection to the rider and mount alike.

~ Helena

Behavior[edit | edit source]

A passive creature, it does not attack unless provoked, by either attacking it or stealing any resources it has dug up after burrowing and emerging.

Wild Roll Rats regularly dig underground and pop back up in the same spot, unearthing gems. They frequently unearth Green Gems, sometimes unearth Blue Gems and rarely unearth Red Gems. Collecting the unearthed gems makes the Roll Rat hostile. They lose this ability after taming.

Appearance[edit | edit source]

The Roll Rat shares many similarities to that of a Naked Mole Rat.

Color Scheme and Regions[edit | edit source]

This section displays the Roll Rat's natural colors and regions. For demonstration, the regions below are colored red over an albino Roll Rat. The colored squares shown underneath each region's description are the colors that the Roll Rat will randomly spawn with to provide an overall range of its natural color scheme. Hover your cursor over a color to display its name and ID.

Server admins can use this region information in the Console Command "cheat SetTargetDinoColor <ColorRegion> <ColorID>".
For example, "cheat SetTargetDinoColor 0 6" would color the Roll Rat's "body main" magenta.

Roll Rat PaintRegion0.jpg
Region 0:
Body Main
X mark.svg

Region 1 is not used
for this Creature.

X mark.svg

Region 2 is not used
for this Creature.

X mark.svg

Region 3 is not used
for this Creature.

Roll Rat PaintRegion4.jpg
Region 4:
Roll Rat PaintRegion5.jpg
Region 5:

Drops[edit | edit source]

Base Stats and Growth[edit | edit source]

Note that creatures will have different stats in Survival of the Fittest

Basic Stats
Attribute Amount at Level 1 Increase per point Taming Bonus
Wild Domesticated1 Add Mult
Health 850 +170 +5.4% 0.07 (TBHM: 90%6)
Stamina 300 +30 +10%
Oxygen 150 +15 +10%
Food 3000 +300 +10% 15%
Weight 400 +8 +4%
Melee Damage 422 +2.1 +1.7% 14% 17.6%
Movement Speed 100% N/A3 +2%
Torpidity 800 +48 N/A4 0.5

1Percentages are based on the value of the stat the moment the creature was tamed (after taming effectiveness)
2The absolute Base Damage is shown here instead of the percentage.
3Wild creatures do not level up movement speed
4Torpidity increases every level on wild creatures, but can not be increased once they are tamed.
6The TamedBaseHealthMultiplier (TBHM) is applied right after taming, before the additive bonus is applied).

Movement Speed
Movement Type Base Speed Sprinting Stamina Used
Wild Domesticated
Walking 250 750 750 5
Swimming 300 N/A N/A N/A

Attack Values
Bite Stamina Cost Attack Range Description
Base Minimum Activation Using the Left Mousebutton (PC), R2 Button (PS4), RT Button (Xbox One), the Roll Rat bites the target.
0 500 0 0
Attack Type Damage Projectile Values Torpor Values Status Effect: Stamina Status Effect: Torpidity
Life Impulse Radius Base Mult Duration Damage Mult Amount Duration Damage Mult Amount
Melee 42
WildGetGems Stamina Cost Attack Range Description
Base Minimum Activation
0 5000 0 0
Attack Type Damage Projectile Values Torpor Values Status Effect: Stamina Status Effect: Torpidity
Life Impulse Radius Base Mult Duration Damage Mult Amount Duration Damage Mult Amount
TamedGetGems Stamina Cost Attack Range Description
Base Minimum Activation
0 5000 0 0
Attack Type Damage Projectile Values Torpor Values Status Effect: Stamina Status Effect: Torpidity
Life Impulse Radius Base Mult Duration Damage Mult Amount Duration Damage Mult Amount

Wild Stats Level-up

Type in values of a wild creature to see on which stats it's emphasized. Green values on a high-level creature are very good for breeding. If you have already tamed your creature you can try to recover the breeding-stats with an external tool.[1]

Roll Rat

The stat-calculator does not work in the mobile-view, see here for alternatives: Apps

Note that after the creature is tamed it gets bonuses on some stats depending on the taming effectiveness. This makes it hard to retrieve the levels on a tamed creature, so this tool is only for wild ones, but gives a first impression, how well the stats are distributed.

Combat[edit | edit source]

General[edit | edit source]

The Roll Rat is a generally passive creature until it is either attacked by the player or if one picks up gems that are laying nearby. When that occurs, the Roll Rat will become hostile and will attack the player. When this occurs, try and run if you can. Your odds of survival are slim.

Strategy[edit | edit source]

Like any rat, snuggle it until it's yours. Note that with its large turning circle, it is prone to falling off cliffs.

Weaponry[edit | edit source]

Use ranged attacks to go and take down the Roll Rat. It is highly advised to avoid close quarter combat or you may get rolled. Its best to either use ranged weapons or try and use a sturdy tame.

Dangers[edit | edit source]

If you take the crystals it digs up, it attacks you, otherwise it is passive. As it is a source of the rare Red Gems, this is often worth it.

Weakness[edit | edit source]

Mediocre speed when not rolling and its large turn radius makes it a weakness towards Roll Rats.

Taming[edit | edit source]

Roll Rat.png Level 1 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 2 12:01 0:12:01
Roll Rat.png Level 30 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 4 08:00 0:24:01
Roll Rat.png Level 60 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 5 07:30 0:30:01
Roll Rat.png Level 90 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 7 07:00 0:42:01
Roll Rat.png Level 120 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 9 06:45 0:54:01
Roll Rat.png Level 150 Feeding Interval Time
Giant Bee Honey.png Giant Bee Honey 11 06:36 1:06:01

Note that the values are for optimal cases, always bring extra supplies!
For a level-dependent count of resources needed, try an external taming calculator.

Preferred Food[edit | edit source]

Giant Bee Honey

Taming Strategy (PC)[edit | edit source]

The Roll Rat has a unique variation to the Passive Taming mechanic - rather than directly pressing E to feed an item to the creature, you have to wait until it burrows down into the ground. Aim at the hole and press 0 (zero) to throw the food at the hole and repeat every time it burrows back in until it is fully tamed. It only accepts Giant Bee Honey as its food source for taming.

Once tamed however, the Roll Rat has a standard herbivore diet.

Quick Steps
  1. Place a single Giant Bee Honey in the last inventory slot.
  2. Wait for the Roll Rat to burrow. Once it's tail is up in the air, it's time to throw.
  3. Aim at the hole and press 0 (zero) to throw the Giant Bee Honey at the hole. Note that this does NOT make you eat the honey.
  4. Repeat all steps until tamed.

The Roll Rat occasionally begins its burrow animation but instead just unearths food - avoid being trigger happy if you have limited resources. You cannot pick thrown honey back up.

Also be aware that because of its large turning circle, it is prone to falling off cliffs midway through the taming process.

  • It appears as though you can "claim" a Roll Rat tame by throwing the honey on the ground in front of it. On PC, other attempts to feed it this way are ignored.
  • The Roll Rat's tame is cancelled if it enters combat - resetting ownership, progress and effectiveness.
  • The Roll Rat occasionally damages nearby units when it eats or emerges from its hole - this does not cause you to enter combat.

You have to wait until the Roll Rat starts to burrow and then throw Giant Bee Honey near them to eat.

Utility[edit | edit source]

Unlike the overwhelming majority of creatures in ARK: Survival Evolved, the Roll Rat's saddle has a durability component that is damaged by combat, or by collisions with clippable resources (except foliage) while rolling. This reduces its usefulness in combat.

Roles[edit | edit source]


Roll Rats can transport several people safely and quickly by rolling. When riding the rat and holding Rmb, it rolls forward at a fast pace. On its way, it breaks rocks and trees that are in its path, however this reduces the durability of the saddle.

It also has 80% weight reduction for Wood and Fungal Wood Aberration Icon.png.


The Roll Rat is a good Wood harvester and a decent Mushroom and Berry harvester, and will even harvest berries and mushrooms by itself if set to wander.


  • Feed them Stimberries while riding the Roll Rat and they will produce a very high amount of feces.


  • Rolling into trees, large mushrooms and rocks will destroy them. This can be used to clear out areas of land quickly to be used for construction, although the resources from the trees and rocks are not harvested. In the same vein, Roll Rats can bulldoze their way through wood and stone structures with relative ease, making them primitive base breakers. They do more damage the faster they're going and leveling up melee damage amplifies the damage they deal.






Weight Reduction[edit | edit source]

The Roll Rat reduces the weight of the following resources by the listed amount while they are in its inventory:

Resource Reduction by
Fungal Wood Aberration Icon.png 80%
Wood 80%

Collectibles[edit | edit source]

Resource Efficiency
Wood.png Wood ★★★★★
Thatch.png Thatch ★★☆☆☆
Berries.png Berries ★☆☆☆☆

Spotlight[edit | edit source]

Notes/Trivia[edit | edit source]

For information pertaining specifically to the real-world Roll Rat, see the relevant Wikipedia article

  • The torn dossier for this creature was first revealed on October 28, 2017.[2]
  • The Roll Rat's ability to roll resembles that of Doedicurus, however the RMB must be held down for the Roll Rat to continue rolling, and the Doedicurus's saddle does not take damage when rolling.
  • The dossier states that the Roll Rat's roll can dent even metal. However this is currently not the case as the roll does no damage to metal structures (but is devastating against stone structures.) Whether or not this is a bug or intentional is currently unknown at this time but as it stands, however it may be talking about its metal saddle and how it breaks over time.
  • Roll Rats gain more movement speed while rolling if levels into movement speed are invested and/or if they're imprinted. This can make Roll Rats the fastest creature for land travel by far but controlling them at such speeds is nigh impossible. Movespeed-invested Roll Rats would not be advised for travel on Aberration or Extinction due to the nature of the maps (Aberration has several steep cliffs and Extinction doesn't have a barrier at the map edges to stop your momentum which can lead to the death of you and your Roll Rat should you cross the edge.)
  • Oddly enough, Roll Rats take full damage from bullets, unlike nearly every other creature in the game.
  • In the Seeker dossier, it shows a group of Seekers attacking a Roll Rat.
  • Real Naked Moll Rats eat plants but they mostly eat the roots and bulbs of the plant. Ark's Roll Rat have adapted to eating the Giant Bee Honey.
  • Roll Rats are a type of Mole Rat that have some how adapted to grow a unusual size. It has also adapted to curl up into a ball and roll around giving it the name Roll Rat.
    • However, Helena's claim that Roll Rats exibit this behavior is contradicted by the fact that wild Roll Rats in-game have never been seen to roll up in a ball and can only do so when tamed and eqipped with a saddle. On the contrary, Wild Roll Rats can dig but as soon as they are tamed, they lose this ability.
  • Helena mentions in her notes about wild Roll Rat's eating plants and fungi. While they do when tamed, they can only be tamed by giving it Giant Bee Honey first.
  • Mole Rats in real life have a eusocial structure similar to, bees, ants, termites and wasps. The Naked Mole Rats are lead by a queen and are the only mammals with this behavior, however Ark's Roll Rat does not have this behavior or is at least never shown similarly to the Titanomyrma . The Giant Bee and Reaper species however do show it.

Gallery[edit | edit source]

References[edit | edit source]