Chest (Barrows)

ClosedOpened

Chest
Released								9 May 2005 (Update)
Members								Yes
Quest								No
Location								Barrows crypt
Options								Open
Examine								A large stone chest.
Map
? (edit)
Advanced data
Object ID								20723

This is the rewards chest of the Barrows minigame. It is located in the middle of the tunnels beneath the brothers' crypts.

Contents 1 Looting the chest 2 Rewards 2.1 Pre-roll 2.1.1 Ahrim's 2.1.2 Dharok's 2.1.3 Guthan's 2.1.4 Karil's 2.1.5 Torag's 2.1.6 Verac's 2.2 Main table 2.3 Tertiary 3 Reward mechanics 3.1 Number of rolls 3.2 Chance of uniques 3.3 Chance of other items 3.4 Notes 3.5 Calculations 4 Changes 5 References

Looting the chest[edit | edit source]

Upon opening the chest, the brother whose crypt the player entered will appear and start attacking the player, if he did not already appear while travelling through the tunnels. It is not required to kill the Barrows brother in order to loot the chest. However, keep in mind that the chance of getting Barrows equipment from the chest increases as more brothers are killed, and players will not be able to receive equipment belonging to brothers they did not kill.

Once the chest is open, click it again to loot it. A window will appear showing you the rewards, which will go into the player's inventory (or be dropped on the ground, if the inventory is full) once the window is closed.

Rewards[edit | edit source]

Drop rates estimated based on 128,000 openings from the Drop Rate Project, unless otherwise cited.

Note that the loot chances below are accurate for a Barrows run with all 6 brothers slain and with full potential (1012 points). To accurately calculate your specific situation, please make use of the Barrows calculator.

See also: Calculator:Barrows

Pre-roll[edit | edit source]

Ahrim's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Ahrim's hood	1	7 × 1/2,448	39,424	7,800
	Ahrim's robetop	1	7 × 1/2,448	1,561,126	30,000
	Ahrim's robeskirt	1	7 × 1/2,448	1,521,899	28,200
	Ahrim's staff	1	7 × 1/2,448	108,922	51,000

Dharok's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Dharok's helm	1	7 × 1/2,448	215,470	61,800
	Dharok's platebody	1	7 × 1/2,448	758,044	168,000
	Dharok's platelegs	1	7 × 1/2,448	924,022	165,000
	Dharok's greataxe	1	7 × 1/2,448	594,159	124,800

Guthan's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Guthan's helm	1	7 × 1/2,448	386,008	61,800
	Guthan's platebody	1	7 × 1/2,448	633,158	168,000
	Guthan's chainskirt	1	7 × 1/2,448	382,253	165,000
	Guthan's warspear	1	7 × 1/2,448	546,375	60,000

Karil's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Karil's coif	1	7 × 1/2,448	53,671	7,800
	Karil's leathertop	1	7 × 1/2,448	2,980,998	30,000
	Karil's leatherskirt	1	7 × 1/2,448	793,753	28,200
	Karil's crossbow	1	7 × 1/2,448	160,242	96,000

Torag's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Torag's helm	1	7 × 1/2,448	89,933	61,800
	Torag's platebody	1	7 × 1/2,448	223,933	168,000
	Torag's platelegs	1	7 × 1/2,448	225,701	165,000
	Torag's hammers	1	7 × 1/2,448	97,338	96,000

Verac's[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Verac's helm	1	7 × 1/2,448	113,973	61,800
	Verac's brassard	1	7 × 1/2,448	205,014	168,000
	Verac's plateskirt	1	7 × 1/2,448	396,960	165,000
	Verac's flail	1	7 × 1/2,448	138,359	96,000

Main table[edit | edit source]

Players who completed the hard Morytania Diary will receive 50% more runes. The base amount without the diary completed is listed below.

	Item	Quantity	Rarity	Price	High Alch
	Coins	2–774	7 × 379/1,012[d 1]	2–774	2–774
	Mind rune	253–336	7 × 125/1,012[d 2]	759–1,008	253–336
	Chaos rune	112–139	7 × 125/1,012[d 3]	5,824–7,228	6,048–7,506
	Death rune	70–83	7 × 125/1,012[d 4]	14,210–16,849	7,560–8,964
	Blood rune	37–43	7 × 125/1,012[d 5]	14,689–17,071	8,880–10,320
	Bolt rack	35–40	7 × 125/1,012[d 6]	2,555–2,920	1,050–1,200
	Loop half of key	1	7 × 3/1,012[d 7]	10,396	60
	Tooth half of key	1	7 × 3/1,012[d 7]	11,201	60
	Dragon med helm	1	7 × 1/1,012[d 8]	58,925	60,000

Tertiary[edit | edit source]

	Item	Quantity	Rarity	Price	High Alch
	Clue scroll (elite)	1	7 × 1/200[d 1]	Not sold	12

Reward mechanics[edit | edit source]

Chance of a Barrows equipment piece, per roll

Brothers killed	Chance
	Frac	%
1	1/392	0.255%
2	1/334	0.299%
3	1/276	0.362%
4	1/218	0.458%
5	1/160	0.625%
6	1/102	0.980%

Number of rolls[edit | edit source]

• There is initially one roll at the drop table.
• Each additional brother killed grants an additional roll at the drop table, to a maximum of seven total rolls.

Chance of uniques[edit | edit source]

• Each brother killed has his associated items added to the possible rewards.
• First, the Barrows equipment is rolled against. The chance of getting a Barrows item is shown in fig.1. Or, in tabular format to the right.
• If the Barrows item chance is successfully hit, one of the available Barrows items is chosen at random - each part has equal chance, but once chosen it will not be chosen again on future rolls.

${\displaystyle {\begin{aligned}P(N)&={\frac {1}{450-58\times N}}&&(1)\end{aligned}}}$

Where P is the drop chance and N is the number of brothers killed.

Chance of other items[edit | edit source]

• If the Barrows item chance is not met, an additional measure called reward potential is calculated as shown in fig.2.
  • Or simply, reward potential is the sum of all the combat levels of the monsters killed, capped at 1000 - including the brothers (all six have a combat sum of 656). This is then added to the two times the number of brothers killed, giving a total maximum reward potential of 1012.
• A roll is performed for a value between one and your reward potential (each inclusive). The result then determines what item is awarded, and how many of it.

${\displaystyle {\begin{aligned}S&=\sum C&S\in [0,1000]&&(2)\\R&=S+2N\end{aligned}}}$

Where R is the reward potential, S is the capped sum of Cs, C is the combat level of a monster killed and N is the number of brothers killed.

Notes[edit | edit source]

• The chances of getting at least one piece of Barrows equipment is approximately 1/15.01 (${\displaystyle {\frac {7655031554227}{114868566764928}}}$ precisely) if you kill all six brothers. This chance is unaffected by the rewards potential that is built by killing other monsters in the crypt. The chance of receiving a specific piece of equipment is approximately 1/350.14 (${\displaystyle {\frac {1504645995025870049809}{526841398983178397417472}}}$ precisely).
• As it is possible to receive more than one piece of Barrows equipment per chest, the average number of Barrows pieces per chest is 7/102 (~1/14.57).
• In order to receive a piece of Barrows equipment, the corresponding brother must be killed before the chest is looted. Thus, if you wanted a piece of Guthan's equipment, you would have to kill Guthan before you are eligible to obtain his equipment. Therefore, it is impossible to acquire Barrows equipment if no brothers are slain, although coins or runes may still be awarded.
• For every brother killed, you get an extra roll for rewards; so if all six brothers are killed, it is possible to obtain up to seven pieces of Barrows equipment.
• It is possible to get multiple items from the same brother, but it is not possible to receive multiple copies of the same item.
• Killing all of the brothers is not required to receive loot; however, not killing all brothers decreases your chance of receiving a Barrows item.

Item	RP required to unlock	RP required for maximum quantity	Chance at max RP per roll
			Frac	%
Coins	1	380	380/1012	37.5%
Mind rune	381	505	125/1012	12.4%
Chaos rune	506	630	125/1012	12.4%
Death rune	631	755	125/1012	12.4%
Blood rune	756	880	125/1012	12.4%
Bolt rack	881	1005	125/1012	12.4%
Key half	1006	N/A (always 1)	6/1012	0.6%
Dragon med helm	1012	N/A (always 1)	1/1012	0.1%

Calculations[edit | edit source]

Here are some values expressing your chances of getting the items. These numbers assume you kill all the brothers each time.

Chests opened	Expected number of uniques[2]	Probability of getting at least 1 unique	Probability of getting at least 1 specific unique	Probability of completing a specific set[3]	Probability of getting at least 1 of each unique[3]
1	0.07	6.66%	0.29%	~0%	0%
10	0.69	49.83%	2.82%	~0%	~0%
25	1.72	82.17%	6.90%	< 0.01%	~0%
50	3.43	96.82%	13.32%	~0.05%	~0%
75	5.15	99.43%	19.30%	~0.1%	~0%
100	6.86	99.90%	24.87%	~0.3%	~0%
250	17.16	~100%	51.08%	~6.5%	~0%
500	34.31	~100%	76.07%	~33.7%	~0.1%
750	51.47	~100%	88.29%	~60.7%	~5%
1000	68.63	~100%	94.27%	~78.8%	~24%
2000	137.26	~100%	99.67%	~98.7%	~92%

Changes[edit | edit source]

Date	Changes
5 March 2015 (update | poll)	You now receive 50% more runes from the Barrows chest if you have completed the Morytania Hard Diary.
4 September 2014 (update)	The Barrows chest will no longer give more than one elite clue at a time.

References[edit | edit source]

v • d • e Barrows
Barrows brothers (Strategies)	Ahrim the Blighted Dharok the Wretched Guthan the Infested Karil the Tainted Torag the Corrupted Verac the Defiled
Monsters	Bloodworm Crypt rat (Giant) Crypt spider (Giant) Skeleton
Rewards	Barrows chest Barrows equipment Dharok's Torag's Ahrim's Verac's Guthan's Karil's
Music	Dance of the Undead Dangerous Way
Related	Strange Old Man The Fall of Six