Duplication glitches, or commonly known as
dupes, are glitches or bugs in the game that allow a player the ability to duplicate items. Throughout the history of 2b2t, there have
been numerous duplication glitches that have drastically changed the server. From dupe clients that tell coordinates to
bases to players being cloned, this is the history of the major duplication glitches
on 2b2t and how their discoveries have changed the server entirely. The first duplication glitch on 2b2t was discovered
in mid-2011. On July 1st, 2011, one of the earliest videos
recording this dupe was uploaded to YouTube. It eventually made its way onto 2b2t, permanently
altering the server's item hierarchy. This dupe required one piston, one sticky
piston, 13 Redstone, and 3 Redstone repeaters. This dupe could only duplicate blocks, but
not items. It required a player to create a fast Redstone
clock, a type of circuit that sends a signal forever at specific intervals, using Redstone
dust and two repeaters. The player would then hook up output from
the clock with one Redstone dust extending out from the clock and into two other circuits. One leads directly to a sticky piston, the
other leads to a repeater and normal piston. The player would then activate the clock by
destroying a piece of Redstone and quickly replacing it. This would cause both pistons to turn on and
off forever. Now all the player had to do was set the repeater
hooked to the normal piston to three ticks and place the desired block in front of the
sticky piston, causing the blocks to dupe and extend outwards indefinitely. Facepunch players would use this frequently
at their bases and players like xcc2 would use it to dupe red wool blocks for the arch
towers at a base called NFE. The next major dupe involved ghost items. It was first discovered in 2013 when a player
named Kinorana noticed that bows would leave behind ghost items when they would break. Right-clicking these bows would cause them
to disappear, but dropping it would duplicate the bows. Kinorana felt like he had something on his
hands, so he tried a variety of things, such as combining two bows in the inventory and
enchanting a ghost bow in an anvil, but these attempts were fruitless. From his observations, these bows would act
effectively as items, but the server would delete them as they were interacted with. Placing the bow into an item frame seemed
to have a different process though. To his surprise, after placing the bow in
an item frame and taking it out, the bow became a legitimate item again. He thought that perhaps it was the distinction
between using an inventory item and interacting with an entity. After this discovery, Kinorana wanted to find
an efficient way to dupe it in bigger quantities. He had heard of minecart dupes before, so
he wanted to give it a shot. Initially, he tried the traditional method
of taking items out, but that didn’t work. He then attempted using hopper minecarts to
take items out before and after going through a nether portal. But after numerous failed attempts, he tried
using a hack module named free cam, and it worked. This allowed him to duplicate items tick perfectly
as they went through the nether portal. He would then share the dupe with his base
members at a base called Valkyria, and so Sato96, Kinorana, and Pyrobyte created a variety
of duplication stashes using this dupe and further improved it to do more than just inconsistently
duplicate single items. This dupe was culturally important to the
server based on a few factors. The first was the presence of god items that
Kinorana previously created that allowed him to make more god items. The second was Kinorana’s presence at Valkyria. Since he shared the dupe with everyone at
the base, his name was placed on the duplicated items, not just for him, but for everyone
on the server. The third was the distribution of these items
and the dupe to groups outside Valkyria, changing the meta of 2b2t, such that god equipment
became commonplace. The next dupe is one of the more unusual dupes
to occur on 2b2t. This dupe allowed players to clone themselves. It was discovered on New Year's day 2014 at
a base called The Lands. One day when a player named Xarviar was spamming
chat, he got kicked. When he logged back in, in front of him was
a duplicate of himself. The clone didn’t do anything, other than
just standing idle. After realizing how weird this was, he showed
his base mate, Jacktherippa. They both started to theorize what the clone
is and how to replicate it. Xarviar decided to kill the clone and it dropped
an exact duplicate of Xarviar’s inventory, meaning that this could be a new dupe. However, they still had no idea how to replicate
it. After experimenting with numerous methods,
Jacktherippa found a way by riding an entity and sending a chat message upon joining on
the same tick. Preferably, they would use a module called
greeter that would send a message to the tick upon joining, at which point the server would
kick you. It would still “log you in'', but you weren’t
actually in. So when Jacktherippa rejoined after turning
off his greeter, a clone would be made. They would tell everyone at The Lands and
they would start duping. However, another discovery was made while
duping clones. Duplicate characters of the group would show
up in the player tab list with random numbers to the end of the player name, and everyone
on the server could literally see that the group had fifty accounts online. The clones wouldn’t log off even after the
group killed them. This would cause suspicion, but the group
would meme and say they bought alternate Minecraft accounts and once the player count got too
high, the server would crash since the clones were registered as a real player. The player clone dupe would last less than
a week as the owner of 2b2t, Hausemaster, would patch it. Eventually, another dupe using minecarts chests
would be discovered in 2016. Using a minecart with a hopper or chest, a
player would make it go through a nether portal. Once it entered the Nether, another player
would stand near a hopper right outside of the nether portal in order to load the chunk. This would duplicate the items. The majority of the player base would use
this and make items become less and less valuable. However, it was short-lived as it was patched
a few days later. But another dupe would take its place. The 11/11 dupe was considered one of the largest
dupes to this point. It was discovered by Kinorana in 2016 when
he saw another player named Chunkr spamming three messages in chat before disconnecting. He knew something strange was going on at
the time, but he didn’t know what exactly was going on. After Kinorana communicated with the group
Nerds Inc., he found out that Chunkr was duping by dropping items, then disconnecting. Kinorana noticed that a lot more players were
spamming three messages before disconnecting as well, and knew it was going to spread fast
based on Chunkr giving his code out like candy. An 11/11 client was made by Kinorana and another
player named c1yd3i on September 19th. This client was purposely made to gather information
from players to locate their bases. This was the second backdoor client that they
created together and was more sophisticated than the first. It was also under heavy scrutiny due to the
distribution of this client and the general public eye of 2b2t. With the press of a button, the client simply
attempted to drop as many items as possible on every game tick and required the player
to disconnect manually. When they logged back on the server, the items
would be duped. The client itself was unsophisticated but
worked effectively. C1yd3i had set up a server that recorded the
information, and it made a simple HTTP POST request to that server with some simple information:
the server it was duping on, the coordinates and dimension, and the player’s usernames. They decided it would cause more panic to
leak the document than to use it themselves, as that would be less interesting. In total, the document had nearly 11,000 entries
and it was eventually patched by Hausemaster on November 26th, 2016 as the server was updated
to Minecraft version 1.11. The 2017 Donkey Dupe was by far one of the
biggest dupes due to its use of shulker boxes, outranking even the 11/11 dupe and it was
one of seven major exploits Kinorana and his friend Mason discovered in 2017. They discovered it when they were doing numerous
experiments at the time due to two major factors: the 2b2t market and illegal items. As such, Kinorana and Mason were discovering
a lot of glitches and doing a lot of observations that Kinorana would later put into code for
his custom client, NoVa. The Donkey Dupe was discovered not accidentally
but through this experimentation. It worked by getting a donkey to half a heart
and putting shulker boxes of items in its inventory. After that, the donkey was sent through a
nether portal to die by a cactus on the other side. The contents would then spit back to the overworld,
meaning that it was duped. The exact reason as to why it worked is unknown,
but sending entities through the Nether causes the Nether to briefly load with no players. Kinorana believes that this loading/unloading
process caused the items to dupe. Not wanting to lose on the opportunity, and
knowing it was soon to be completely public, Kinorana and Mason leaked it on YouTube in
an attempt to gain subscribers. The dupe only lasted three days, yet managed
to devalue even stacked armor as players used it to get more stacked gear. A few weeks after the Donkey Dupe, another
dupe called the Crafting Dupe was discovered. It was discovered on Minecraft’s paper spigot
issue tracker. When the server updated from Minecraft version
1.11 to 1.12, the server was on a temporary map for quite a while. AlphaComputer had set up stashes around the
server with different illegal items in different forms; some of them were stored in shulker
boxes inside item frames, others in minecart chests, and others stored in zombies' hands. It was very widely known that the illegals
were going to get removed eventually, due to a Reddit post, so they prepared it this
way. Alphacomputer had, however, kept a few at
a stash he was logged out at so that they could test immediately after the original
map came back. When the original map came back there were
no restrictions for about an hour, so they were able to do whatever they wanted, including
opening a chest with an illegal item without harm. About thirty minutes after the server came
back up, Chunkr posted in the Spawn Masons Discord saying, “NEW DUPEEEEEE” and posted
a gif of him performing the duplication glitch. In the Discord, a player named 0x22 and AlphaComputer
were in a private voice chat to test the exploit, and to their surprise, it worked. AlphaComputer then performed it with several
different items at a stash, including 32k swords. Alpha would then send Kinorana this picture. When Kinorana saw it, he couldn't believe
his eyes, but after a few minutes, he spotted certain details that made him believe otherwise. In the picture, he has stacks of 63 and he
knew that AlphaComputer didn’t have the patience to intentionally place not full stacks,
so Kinorana knew then that it was real. This initiated a call, and AlphaComputer showed
Kinorana how to perform the exploit. To perform it, you had to drop the item that
the player wanted to dupe and then quickly spam click on any crafting recipe in the book,
which would transfer blocks from your inventory into the small crafting interface in your
inventory screen. When the player picked up the desired item
while still spam clicking on the recipe in the book, a glitch would happen where the
item would immediately stack to 64. This would even stack items that are normally
unstackable, such as armor, weapons, tools, shulker boxes, etc. The dupe was quickly patched on July 24th,
2017 by Hausemaster and he classified these stacks of unstackable items as illegals, preventing
any items going above 64 from going in chests or on the ground without resetting. A few years later, another powerful dupe would
be discovered. The 2019 Chunk Dupe was widely regarded as
one of the most powerful dupes on the server. You could have as many chests as you want
in a chunk and dupe it with ease. Even at my ungriefed base in the millions,
I used it with my friend Endermqn. Nobody knows who discovered it, but it worked
by overloading a chunk with large file sizes, preventing the chunk from being saved. This was usually done with large text characters
with multiple books. You could change any portion of a Minecraft
chunk, but if you unloaded and reloaded it, it would revert. This was usually accomplished by building
a tunnel, reloading your chunks at the end, and then returning to the duped chunk. However, the dupe was eventually patched on
February 23, 2019, after the dupe caused massive lag to the server. Similar to previous Donkey Dupes, the 2019
Portal Donkey Dupe used donkeys at 1 HP and then threw them into an end portal at a high
distance with items in their chest. The donkey would fall through the end portal
and die at the same time, with the original and the duped items appearing on the other
side. This dupe was originally discovered in 2017
by a YouTuber named Flashee and it was theorized to work on Spigot servers like 2b2t. A player duo on another anarchy server called
Contantium used this dupe during late November of 2019 and the start of January of 2020 until
the admin disabled access to donkey inventories. On 2b2t, the dupe became widespread in February
when Team Wao leaked it in a YouTube video. This caused players to camp the end portal
from dupers and was patched a few weeks later. However, another dupe was discovered shortly
after. Around April of 2020 during a spawn event
known as “The Bakery'', there was a very high demand for furnaces. The current dupe at the time, which was the
End Portal Donkey Dupe, was very slow and could not meet the demand of nearly five double
chests of furnace shulkers per day. The solution was for the organizers of the
bakery, known as “The Brownmen '' consisting of Redstoner2b2t, Steve3, and Mahan to find
a better dupe. After a few hours of experimentation, they
found the donkey minecart dupe. This dupe worked by keeping a donkey's inventory
open client-side as it was pushed into unloaded chunks while riding a minecart, then taking
the items out of the inventory window on your screen. The reason this was so powerful at the time
was it could be done over and over again without killing the donkey. The donkey gets pushed back to its starting
position and then the process repeats. This dupe never went public but caused enough
suspicion that it was patched near the end of April. As a result, Hausemaster made it so donkey
Inventories close automatically when they are unloaded. Around the end of July 2020 and after running
out of all the items produced by the Donkey Minecart Dupe, The Brownmen needed another
dupe. However, Hausemaster had patched all methods
of unloading a ridden donkey which is what all god mode dupes were based on. Steve3 used his knowledge of Java to find
some exceptions to this rule. After about an hour, the final conclusion
was found. Other entities connected to an entity stack
that the player was a part of would not be considered by Hausemaster’s plugin, allowing
them to unload and go into a god mode state. To put it simply, an entity stack is multiple
entities mounting each other, such as the player riding a donkey while riding a boat. The result from godmoding the entity stack
and logging out was the boat and donkey that was not being ridden getting duped. This is because they became in a god mode
state and got saved to the chunk while the entire entity stack logged out with the player. This was used for many months privately and
used to supply events like No Server November and large projects such as the Infinity Incursion
water cube. At the start of September in a voice chat
at Avalysium, Redstoner mentioned being able to supply the base in the future with a dupe. A member named DrBeardStash supposedly went
on a rampage about not having a dupe and promptly left the base Discord. A player known as ionar, who is his accomplice
and a well-known client developer, was also very upset about the fact that others had
found a dupe instead of him. He then spent the next two weeks trying to
brute-force it, testing everything and eventually finding it based on information he could get
from Redstoner, Steve3, and Mahan about donkey and god mode mechanics. Noahj3, who was Ionars friend that helped
discover it, made a simple agreement with him: Share it with no one. As soon as this happened, ionar leaked it
to DrBeardStash, then a conflict occurred with Noah3j, leading to ionar leaving the
group and plans to blow up the base. This dupe was one of the first to utilize
Autoduper clients on a mass scale. Because of the excessive complexity of all
the steps, Steve3 made an auto dupe on the private Brownware client around August and
Lonar had similar ideas. A private version of a hacked client known
as Pyro Client was developed with Autoduper in it. However, it had fewer functions compared to
Steve3’s as such not being able to automatically send donkeys to kill chambers and not being
as fast. This didn’t concern ionar, though, as he
was planning on selling the dupe on his new client, Pyro. After learning of ionar and DrBeardStash's
plan to nuke all three current bases from IHackedXVIDEOS, Noah3j gave coordinates to
multiple stashes and map arts belonging to Lonar and DrBeardStash after Avalonia members
evacuate all three major bases with their supplies. This counter strike was a surprise and blow
to ionar, and on September 28th, he dropped the Autodupe publicly with the release of
version 1.4.1 of his client. After the wider community had been starved
from a dupe for over 7 months, ionar got what he wanted. But at what cost? His reputation had been badly damaged and
multiple stashes belonging to him and DrBeardStash got blown up in revenge. Pyro had his reputation worsened as his client
was tarnished when players constantly filled the review channel with bad reviews. The dupe lasted publicly for nearly two months
because the actual method was not public. The Pyro Client was unclear, meaning the steps
could not be determined from the code. This affected Hausemaster as well since he
is unable to spectate any god mode dupe. If he loads the chunks, the dupe will just
fail. However, this all came to an end on November
23rd after an unknown player gave Hausemaster the Brownmen Autoduper source code that had
been ported to another hacked client named Kami Blue. Hausemaster would patch the dupe two days
later on November 25th, and as a result of all of this, Hausemaster updated the god mode
patch so that it checks every entity on the entity stack and deletes all entities that
want to be unloaded, patching the god mode state. This is likely to be the last 1.12 donkey
dupe. Today, there are currently no public duplication
glitches, however, it isn’t to say that there are most likely private dupes that are
most likely even more powerful than the dupes talked about in this video. When 2b2t updates above 1.12.2, what’s to
say that there will not be a handful of dupes for everyone to use? Until then, we will have to wait and see.
