Roll Rat

Roll Rat

Dossier Roll Rat.png

Dossier

These values may differ with what you see in-game or written elsewhere. But that is what the dossier says.

Group

Mammals

Species

Heterocephalus magnus

Time Period

Holocene

Diet

Herbivore

Temperament

Passive

Release Versions

275.0
December 12, 2017

768.0
December 12, 2017

518.0
December 12, 2017

Not Yet Released

Not Yet Released

DLC

Aberration, Valguero

Spawn Command

admincheat summon MoleRat_Character_BP_C
or
admincheat SpawnDino "Blueprint'/Game/Aberration/Dinos/MoleRat/MoleRat_Character_BP.MoleRat_Character_BP'" 500 0 0 35

Domestication

Tameable

Rideable

Breedable

Yes

Yes

Yes

Torpor Immune

No

Taming Method

Passive

Preferred Food

Giant Bee Honey

Equipment

Roll Rat Saddle  (Level 58)

Rider Weaponry

Yes

Humans Can Carry

No

Data

XP For Kill

14 XP

Drops

• Hide
• Keratin
• Raw Meat
• Raw Prime Meat

Feces Size

Medium

Drag Weight

245

Radiation Immune

No

Carryable By

• Karkinos
• Quetzal
• Tek Quetzal

Immobilized By

• Chain Bola
• Large Bear Trap
• Plant Species Y

Can Damage

Thatch
Greenhouse
Wood

Reproduction

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

Habitat

Colorvision Prota- / Deuteranopia Tritanopia

Common             Rare
  Untameable   Cave

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

Basic Info

Dossier

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.

	“	Wild 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. Domesticated 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

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

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

Color Scheme and Regions

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.

Region 0: Body Main	Region 1 is not used for this Creature.	Region 2 is not used for this Creature.
Region 3 is not used for this Creature.	Region 4: Scales	Region 5: Underbelly

Region 0: Body MainRegion 4: ScalesRegion 5: Underbelly

Drops

• Raw Meat
• Hide
• Keratin

Base Stats and Growth

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).

• For a comparison of the stats of all creatures, see Base Creature Statistics.
• For an explanation of exactly how the levelup calculation works, see Creature Stats Calculation.

Movement Speed

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

• These are the base speeds of the creature at 100% Movement Speed
• For a comparison of the speeds of all creatures, see Base Creature Speeds

Attack Values

Bite		Stamina Cost	Attack Range			Description
			Base	Minimum	Activation	Using the (PC), (PS4), (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
Melee

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
Melee

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.

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

General

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

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

Weaponry

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

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

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

Taming

Level 1		Feeding Interval	Time
Giant Bee Honey	2	12:01	0:12:01

Level 30		Feeding Interval	Time
Giant Bee Honey	4	08:00	0:24:01

Level 60		Feeding Interval	Time
Giant Bee Honey	5	07:30	0:30:01

Level 90		Feeding Interval	Time
Giant Bee Honey	7	07:00	0:42:01

Level 120		Feeding Interval	Time
Giant Bee Honey	9	06:45	0:54:01

Level 150		Feeding Interval	Time
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

Giant Bee Honey

Taming Strategy (PC)

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.

Notes

• 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

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

Transport

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 .

Harvester:

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.

Fertilizer:

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

Bulldozer:

• 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.

Damage:

Travel:

Guardian:

Combatant:

Defender:

Weight Reduction

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	80%
Wood	80%

Collectibles

Resource	Efficiency
Wood	★★★★★
Thatch	★★☆☆☆
Berries	★☆☆☆☆

Notes/Trivia

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.
• In the dossier for the Roll Rat it Is shown to be a bareback ride tame however in game you need a saddle in order to ride it, this is presumably a mistake.
• 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.
• While taming it is also possible to throw the Giant Bee Honey while being riding on a tame e.g. Argentavis. It is not necessary to stand next to the hole. This makes taming easier and safer.

Gallery

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  Torn dossier

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