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::|CONTENTS

1. Series with many formats
2. Format-focused series
3. See also

Many BotBrs host XHBs with recurrent themes or ideas. After the ability to schedule XHBs in advance was implemented in 2020, they became especially popular, but older series have existed as well. This article hopes to catalog them all, but updating it is quite the process at this point. Each section is sorted alphabetically.

Last updated Jan 3, Year of the Baconator

Series with many formats

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Several XHB series have occurred where the idea was to have a different format every time, or that utilized many different formats along the way:

Accompany this poem
Multi-format series hosted by roz.

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#X

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special


Badge Quest
Hosted by Chip Champion as a part of his badge completionist collecting.

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#10

#11


Blob OHB
Blob (emoji) themed series hosted by kleeder.

#1 -

#2 -

#3


BOTBtober 2017
Hosted by Sinc-X at the end of October. Differs from 2016's edition, which was allgear-focused.

#1 -

#2A -

#2B -

#3 -

#4 -

#5


chopperz
Waveform manipulation based series hosted by blower5, in which participants receive a single drum sample and a single miscellaneous sample.

#0 -

#1


colours
A graphically focused OHB series hosted by sean.

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déjà vu
A multi-format series hosted by nitrofurano that recalls past bitpacks of yore.

#1 -

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#4

E
NES-based series hosted by kleeder. The overall theme was to only use the note E with barely any effects to reach other frequencies.

#1 -

#2 -

#3


Eye to ear
Series hosted by OminPigeonMaster with the general idea to write music for a gfx entry that was previously submitted to BotB

#1 -

#2


F MINOR
ChannelF/fSound series hosted by kleeder. Works as a sequel for F MAJOR.

#1 -

#2


From The Past
Series hosted by CastleNes.

#1 -

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#4


hosting one ohb per day until single-format-major 1 starts
Series hosted by kleeder.

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Level Music
An XHB series hosted by OminPigeonMaster with each bitpack prompt describing a level in a video game. It is one of the longest-running XHB series in existence. Though it began as a purely allgear series, several Chipist formats have been incorporated from S01E41 onward.

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#56

OPM started a second season right after the 56th battle of season one was hosted:

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secret


making music for an imaginary soundchip
Mostly module-focused (and fairly self-explanatory) series hosted by kleeder.

#1 -

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#6


MEATPOP PRODUCER CHALLENGE
One-off series hosted by damifortune which had sample & midi format prep battles and culminated in a vocal format 4HB.

prep 1 -

prep 2 -

prep 3 -

main event


Multi 100
A series hosted by various BotBrs held for Tilde in the spirit of finishing a "100 songs in 1 year" challenge.

#1 -

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#6


OHB Advent Calendar 2018
Before Advent Calendar became a major battle, it was a daily OHB series hosted by kleeder.

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#24


OHB Advent Calendar 2019
Before Advent Calendar became a major battle, it was a daily OHB series hosted by kleeder.

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One-OHB-Per-Day-Challenge
Series hosted by kleeder.

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Press start button
Series hosted by CastleNes.

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Quest Awaiting
Series hosted by CastleNes.

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Rare Format Sighting
Series for rare formats hosted by Jangler first and other people later.

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Secret Sunday
Formerly-weekly series hosted by Jessica Robo with a different, randomly-rolled format each week.

#1 -

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Shmup Shmuck
Multi-format Shoot-'Em-Up themed series by OminPigeonMaster.

#1 -

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#3


shoplift
Typeface-focused series hosted by nitrofurano.

#1 -

#2


Short Circuit
Series hosted by CastleNes.

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structures
Series hosted by sean with a different structure focused upon in the bitpack every time.

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#6


The McDonalds Mix and Match
Series hosted by tree.

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#3


Vav's Lunch Break
Mostly hosted by Vav, this is a series of allgear/fakebit/wildchip XHBs, done in lieu of XHB activity. Has been on hiatus ever since Vav's work stopped him from being able to make music there.

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where breast
Originally AYM-focused, now multi-format, mammary-themed series hosted by Zlew.

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you get what you want
A former weekly series hosted by kleeder in which each week's format was chosen by another BotBr (the setup/scheduling thread was here). The series was set to end upon boonloss, which #8, HTML5 did incur.

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#8
A "sequel" was also briefly hosted by TristEndo and damifortune which continues the original series.

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#3


Zonecore
Zone-Generator-based series hosted by OminPigeonMaster.

#1 -

#2 -

#3 -

#4

Format-focused series

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Many XHB series are also focused on particular formats:

2d map
Visuall series hosted by nitrofurano, themed around creating 2D map tiles.
#1 - #2 - #3 - - #4 - #5


32 pixels wide, and 32 pixels tall, tile design battle
A tile design pixel art series hosted by ViLXDRYAD.
#1 - #2 - #3 - #4 - #5 - #6 - #7


5 in 60
"5 songs in 60 minutes" OHB series started by mootbooxle and picked up by other BotBrs.
#1 - #2 - #3


6 in 60
"6 songs in 60 minutes" OHB series hosted primarily by mootbooxle. #4 was hosted by someone else and it hasn't been located yet. Mysterious!
#1 - #2 - #3 - #4 - #5 - #6 - #7


a Kirby Kristmas
A Kirby-themed allgear series by OminPigeonMaster, in which OPM wrote a bunch of Kirby music for a friend's Christmas gift.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12
Bonus: NSF spinoff


A mimiga's badge quest
A visuall series by ViLXDRYAD. So far, series bitpacks have always involved bunnies.
#1 - #2 - #3 - #4 - #5 - #6


AC21 Bit Period
A 4HB series hosted by kleeder in preparation for Advent Calendar 2021.
#1 - #2


AIGHT EIGHTKAY
Mod08k series hosted by hanna.
#1 - #2


ANIMATION
Animation-themed visuall 2HB series hosted by hanna.
#1 - #2


another scale battle
MSGS MIDI series hosted by nitrofurano in which participants are restricted to a certain scale (+ optional percussion).
#1 - #2


Badge Quest
VGM series hosted by kleeder. Unrelated to the multi-format series of the same name by Chip Champion.
#1 - #2 - #3 - #4


beepcord Xth interventional BEEPBATTLE
Jummbox 4HB series by kfaraday.
#1 - #2


BotBer arts
Visuall series hosted by CastleNes.
#1 - #2 - #3 - #4 - #5 - #6 - #7* - #8 - #9 - #A - #B - #C - #D - #E - #F
*not hosted by CastleNes


BOTBtober 2016
A small OHB series hosted by Sinc-X at the end of October. While 2016 was entirely allgear-based, 2017 varied between the formats.
#1 - #2 - #3 - #4 - #5


BotB Rewind
A yearly 4HB series by kleeder that asks participants to reflect upon their year on BotB.
2020 - 2021


breakcore
Allgear series hosted by XFREDDYxDANGERX.
#1 - #2


Byeah Videogame
S3xmodit series hosted by Lincent requiring usage of some included vocal samples each time. The name is a reference to long-running remix series YEA VIDEOGAME.
#1 - #2 - #3


chamber music
Musescore series hosted by damifortune in which participants compose accurately for a different small ensemble each time.
#1 - #2 - #3 - #4 - #5


ch1p5 4 br8k4st
NSF+ series hosted by A64.
#1 - #2


composition homework
Teaching-focused allgear series hosted by big lumby for Lotepamera.
#1 - #2 - #3 - #4


COUNTELPRO
Module series hosted by keffie.

#1 -

#2 -

#3


cute and little songies
A wildchip series hosted by kleeder focusing on entries less than a minute long.
#1 - #2


daily famitrack
Famitracker series hosted by kleeder.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11


Darker Than Night
Allgear series hosted by CastleNes.
#1 - #2


Did U Say Bunny Batol?
Visuall series hosted by Tex focused on bunnies. Perhaps a spiritual successor to the "A mimiga's badge quest" series.
#1 - #2 - #3


Division
S3xmodit series hosted by hqaoqu.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17


double whammer
An allgear series started by tree and joined in by other BotBrs. Multiple-OHB-at-once madness!
#1/#1 - #2/#2 - #3/#3/#3/#3


Drive to Golden MegaRoad
Sega Genesis series hosted by OminPigeonMaster.
#1 - #2 - #3


dub techno
Dub techno focused allgear series hosted by tennisers.
#1 - #2


EP in a Week Challenge
An XHB-allgear-series hosted by OminPigeonMaster. Related Challenge Thread can be found here.
#1 - #2 - #3 - #4 - #5


Fallgear
The sequel to the Summer Allgear Series, an allgear series hosted by hanna in lieu of a proper autumn-themed allgear major.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20 - #21 - #22


Five Sounds
An MT-32 format counterpart to the MIDI series Six Sounds - both hosted by BubblegumOctopus - in which the bitpack contains five RNG-chosen instruments to which participants are restricted.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8


friends battle
Allgear series hosted by XFREDDYxDANGERX.
#1 - #2


Frosty The Snowman's Creativity Workshop
Wintry allgear series hosted by TristEndo.
#1 - #2


Gameboy Marathon
Gameboy series hosted by TristEndo while speedrunning Gameboy badge acquisition with 2a03fox.
#1 - #2 - #3 - #4 - #5


Game Music Adventure
Allgear 4HB series hosted by bluenocturne about making polished VGM tunes with commission-like parameters resembling game dev requests.
#1 - #2 - #3


GBMod XHB
Gameboy series hosted by DevEd requiring use of their .xm to .gb converter.
#1 - #2


Genrelizations
Allgear series hosted by wizardmusic that focuses on a different genre each time.
#1 - #2 - #2 (2) - #3


Getting the wildchip for NARD
Wildchip series hosted by Bravoman with intent of helping a fellow BotBr gain the format badge.
#1 - #2


hearty party
Pixel series hosted by nightmoth.
#1 - #2 - #3 - #4


HOMM-Series
Allgear series hosted by kleeder.
#1 - #2 - #3


horse
Allgear series hosted by sulkaritari.
#1 - #2 - #3 - #4


Hour-DM
NSF+ series hosted by A64 in which participants make a different subgenre of EDM each time.
#1 - #2 - #3 - #4


i litsen to REAL musicc
Allgear series hosted by 2a03fox.
#1 - #2


I want battle!
Visuall series hosted by CastleNes.
#1 - #2 - #3 - #4


journal entry
MSGS MIDI series hosted by mirageofher with journal entries for bitpacks.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12


jummbox TOP O' THE MONTH battle (quarter 2)
Jummbox 2HB series hosted by kfaraday.
#1 - #2


jummbox (quarter 2) tiny battle
Jummbox OHB series hosted by kfaraday.
#1 - #2 - #3 - #4 - #5 - #6


Karl's Xth Battle!
Wildchip XHB series hosted by kgb525.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9


keffie needs a routine!
Module series hosted by charlotte and other keffie accounts.

#1 -

#2 -

#3 -

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#8


klaeddemix
Remix series by mirageofher.
#1 - #2


klangfreudians SECRET meeting
Klangfreude OHB series hosted by charlotte.
#1 - #2 - #3 - #4 - #5


level music, basically
MT-32 series by tree inspired by OPM's long-running Level Music series.
#1 - #2


lime draw battle
Draw series hosted by sleeparrow.
#1 - #2 - #3 - #4


lime pixel battle
Pixel series hosted by sleeparrow and later azurglade.
#1 - #2 - #3 - #4 - #5


lime's picture game
Allgear XHB series hosted by azurglade where the prompt is an image.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #12 (another) - #13 - #14 - #15


make a song inspired by this image
Allgear (and as of recently, sometimes wildchip) series hosted by tree. AKA "make a song based on this image".
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 -

#18 -

#19 - #20

#21 - #22 - #23 - #24 - #25 -

#26a = #26b - #27 - #28 - #29 - #30
#31 - #32 - #33 - #34 - #35 - #36


MIDI Monday
A formerly-weekly MSGS MIDI series hosted by Jessica Robo.
#1 - #2 - #3 - #4


MIDImoji
MIDI series hosted by damifortune with a different emoji for the bitpack every time. From #12 onward, the series expanded from MSGS MIDI to include other MIDI formats (XG, MT32) as well.
#1🌴 - #2☄️ - #3🍵 - #4☔ - #5🔮 - #6🌶️ - #7🧀 - #8⚡ - #9🗝️ - #10☁️
#11⛰️ - #12🌆 - #13🦖 - #14🏯 - #15🌈 - #16🪁 - #17🛎️ - #18🎺 - #19🎀 - #20🍒
#21⚔️ - #22🦠 - #23🌠 - #24🏙️ - #25🐦 - #26🌋 - #27🎮 - #28💰 - #29🍁 - #30🎣
#31🧁 - #32❄️ - #33🎻 - #34🍓 - #35🔥 - #36🧛 - #37🌱 - #38🚀 - #39🌵


Midweek Module Madness
S3xmodit 2HB series hosted by hanna.
#1 - #2 - #3 - #4 - #5 - #6 - #7.1 - #7.2 - #8 - #9


Mini Sample Pack Contest
Allgear series hosted by NardInYourYard where a provided sample pack must be used in addition to other sounds of participants' choice. Despite the name, not affiliated with Sample Pack Contest (or the related Sample Pack Series).
#1 - #2 - #3


Moderately sized songule
Spinoff of damifortune's Tiny Songule series listed below.
#1 - #2 -


modnar s3xmodit
S3xmodit series hosted by ASIKWUSpulse.
#1 - #2 - #3 - #4 - #5 - #6


Monster Madness
Visuall series hosted by OminPigeonMaster themed around designing monsters.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15


Monster Midi
Spooky MIDI series hosted by TristEndo.
#1 - #2 - #3


n chars or less
A TIC80 series hosted both by sean and nitrofurano.
#1 - #2 - #3 - #4 - #5


Nice costume!
Halloween-focused visuall series hosted by OminPigeonMaster.
#1 - #2 - #3* - #3 - #4 - #5
*not hosted by OPM


NO VIDEOGAME
NSF classic series hosted by OminPigeonMaster. The title is a riff on longrunning OHB series YEA VIDEOGAME. OPM created an evil version.
#1 - #10


Oh The Humanity
Allgear series hosted by Mikaboshii where the bitpacks tell a story over time.
#1 - #2 - #3 - #4 - #5 - #6


OK FOURKAY
Mod04k series hosted by hanna.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15


One Hour Blattle
Allgear series hosted by blower5.
#0 - #1


one sample only
Module series hosted by kleeder.

#1 -

#2 -

#3 -

#4


PAINTIN YOUR PANTS
A series all about Mario Paint hosted by big lumby.

#1 -

#2 -

#3 -

#4



photomash road to somewhere
A photomash series hosted by nitrofurano.
#1 - #2 - #3 - #4 - #5


pixuall
Pixel-focused visuall series hosted by sean.
#1


pre-photomash
Visuall series hosted by nitrofurano where the submissions are intended to be used in a photomash battle afterward, much like sample battles preceding remix battles.
#1 - #2 - #3 - #4 - #5
Resulting photomash battles, hosted by kleeder and damifortune:
#1 - no #2 :( - #3 - #4 - #5


project ridealong
Series hosted by Vav focused on trying to nail the vibe for a commission.
#1 - #2 - #3 - #4 - #5


PXTUNES
PxTone OHB and 2HB series hosted by damifortune which alternates between sample packs and dramatic text prompts (similar to the seasonal Allgear Series).
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26


random word
Wildchip XHB series hosted by Viraxor where the prompt is a single word.
#1 - #2 - #3 - #4 - #5


Road to Bronze Visuall
Visuall series hosted by tree in pursuit of the bronze visuall badge.
#1 - #2 - #3 - #4 - #5 - #6 - #6.5 - #7 - #8


Road to Bronze XG
Yamaha XG series hosted by BubblegumOctopus in pursuit of the bronze XG badge. Features story-driven bitpacks involving the previous winning entry!
#1 - #2 - #3 - #4 - #5 - #6 - #7


Road to Golden JummBox
JummBox series hosted by hanna in pursuit of the golden JummBox badge.
#1 - #2 - #3 - #4


Road to Golden MIDI
MSGS MIDI series hosted by BubblegumOctopus in pursuit of the golden MIDI badge.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8


Road to Golden nsf
NSF series hosted by kleeder in pursuit of the golden NSF badge.
#1 - #2 - #3 - #4


Road to Golden Sexmodit
S3xmodit series hosted by kleeder in pursuit of the golden badge for the format. A long-runner along with Road to Golden Wildchip, this series is responsible for a greater proliferation of beginning battle and/or series names with "Road to..."
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26 - #27 - #28


Road to Golden Wildchip
Wildchip Series hosted by kleeder.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26 - #27 - #28 - #29 - #30


Road to Mount-32
MT-32 series hosted by MelonadeM (also by one of their previous accounts mega9man).
#0 - #1 - #2 - #3 - #4 - #5 - #6 - #7 - #8


Road to Musescore Badge
A MuseScore series hosted by mirageofher and kleeder.
#1 - #2 - #3 - #4 - #5 - #6 - #7


Robotnik's Workshop
Visual Series hosted by OminPigeonMaster.
#1 - #2 - #3 - #4


RPG Soundtrack
An allgear series hosted by Kris in which a couple descriptors are randomly chosen and participants must soundtrack the result in an RPG-like style.
#1 - #2 - #3 - #4 - #5


s3xmodit road to somewhere
S3xmodit series hosted by nitrofurano.
#1 - #2 - #3 - #4


Sample Pack Series
Hosted by damifortune (with early installments by hanna until badge acquisition happened), this is a series of remix OHBs hosted as a BotB equivalent to Sample Pack Contest

. Many earlier bitpacks in the series used samples from past contests.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26 - #27 - #28 - #29 - #30
#31 - #32 - #33 - #34 - #35 - #36 - #37 - #38 - #39 - #40
#41 - #42 - #43 - #44


Sample Spotlight
Single-sample remix series hosted by damifortune.
#1 - #2 - #3


SAMPLESCAPES
Allgear series featuring a sample pack as non-required inspiration hosted by 02FD.
#1 - #2 - #3 - #4


Sega Genesis ExMO
A s3xmodit XHB series with YM2612 samples hosted by ASIKWUSpulse.
#1 - #2 - #3


shuffle series
Allgear series hosted by BinkNSmacker where the bitpack is a stylized image with lyrics taken from a random song.
#1 - #2 - #3 - #4 - #5


six drums
MSGS MIDI series hosted by damifortune in which participants are required to use a set of 6 randomly chosen drum sounds (given in the bitpack). Inspired by BgO's Six Sounds, listed below.
#1 - #2 - #3


Six Sounds
MSGS MIDI series hosted by BubblegumOctopus in which participants are required to only use 6 randomly chosen MIDI patches (+ drums) given in the bitpack.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #22 (2) - #23 - #24 - #25


SiXG Sounds
XG MIDI series hosted by BubblegumOctopus in which participants are required to only use 6 randomly chosen patches (+ drums) given in the bitpack.
#1

Sixty Four Expansion Pak
Nintendo 64 remix series hosted by kilowatt64. Inspired by YEA VIDEOGAME, it features samples from a new N64 game each instalment.
#1 - #2

SMW-Hacking Batol
A Lunar Magic battle series by kleeder.
#1

* - #2

* - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12
* Not hosted on BotB.


Soundtrack Sessions
A small nsf OHB series hosted by ElHuesudoII in 2014.
#1 - #2 - #3 - #4


Spring Allgear Series
Allgear series hosted by hanna - the final of four seasons' worth of Allgear Series!
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12


SPY MISSION
Story-prompt-based allgear series nsf OHB series hosted by NardInYourYard.
#1 - #2 - #3


squarish
SVG series hosted by nitrofurano utilizing the web tool Squarish.
#1 - #2 - #3


Summer Allgear Series
XHB series hosted by hanna during the season of summer, intended to be the allgear counterpart to Summer Chip. One of the first long-running series of the XHB scheduling era, and was so successful it ran for a full year under new seasonal names. Used very storytelling-focused bitpack prompts.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - SEASON ALLGEAR FINALE
(season 2) #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26 - #27 - #28 - #29


Super Sample Pack Series
A 2HB remix series hosted by damifortune. As the title sort of implies, this is the 2HB equivalent to the "Sample Pack Series" of OHBs.
#1 - #2 - #3 - #4 - #5 - #6 - #7


surprise oneoff!!!
Allgear series (despite the name!) hosted by BinkNSmacker.
#1 - #2


Synth City
Allgear series hosted by CastleNes.
#1 - #2


Teletext Badge Grind
Teletext series by mirageofher.
#1 - #2 - #3 - #4 - #5 - #6


the climb of mt. nsfc
NSF classic series hosted by OPM. Title in reference to this Monthly Major Battle.
#1 - #2


the extra chips makes it sound more plus
NSF+ series hosted by TristEndo.
#1 - #2 - #3


the motto
Allgear series hosted by Sinc-X focused on strong compositional choices.
#1 - #2 - #3


THE ELEMENTS...
Allgear 4HB series hosted by kfaraday themed around the four classical elements.
#1 - #2 - #3 - #4 - #5 - #6


The Ultimate Hum
A wildchip 4HB project organized by Maximemoring (who also streamed weekly synclistens for it) and hosted by puke7. For more information read its lyceum page.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
Bonus: album art battle


Theme Allgear
Allgear series hosted by CastleNes.
#1 - #2 - #3 - #4 - #5


this series will end when castle returns
An alternating allgear-visuall series hosted by mirageofher.
#1 - #2 - #3 - #4 - #5


Three Sounds
MSGS MIDI series hosted by BubblegumOctopus as a variant of the Six Sounds series. Unlike Six Sounds, this series lets you use the given sounds (which are chosen by RNG) on as many channels as you want.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20 - #21


Time Signature Terror
Allgear series hosted by OminPigeonMaster. Each battle requires the use of one or several odd time signatures.
#1 - #2 - #3


tiny songule
A small module series hosted by damifortune. Includes all of the modXk formats; thus far it has gone in a size-order cycle (i.e. 4k all the way up to 64k).
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8
#9 - #10 - #11 - #12 - #13 - #14 - #15


Transcendence.
Renoise series hosted by ordinate.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10


Unlocking Nintendo DS samples
Remix series hosted by Tex with a different DS game's sample pack every time.
#1 - #2


videos i took when i was drunk
A vocal series hosted by mirageofher.
#1 - #2 - #3


Visufall
A visuall series initially hosted by big lumby alone. In later rounds, a group of interim hosts was formed, including OminPigeonMaster, sean, CastleNes, and mirageofher.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10


Winter Allgear Series
Allgear series hosted by hanna - the third of four Allgear Series seasons.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11


Write a theme song for this vegetable.
NSF+ series hosted by roz.
#1 - #2


xenharmonic pogfest
Microtonal-focused allgear series hosted by 2a03fox.
mav7 - mav9 - 26edo - 7edo - 13edo - 15edo - 56edo


YEA VIDEOGAME
A remix OHB series hosted by damifortune where the bitpack contains the sampleset of a different SNES game every week (check the most recent bitpack for a .txt containing the list of games). In addition to the weekly battle, there are sometimes reruns of previous bitpacks, and more recently, the series has been expanded to include SPC format spinoffs, denoted with a different numbering system.
#1 - #2 - #3 - #4 - #5 - #6 - #7 - #8 - #9 - #10
#11 - #12 - #13 - #14 - #15 - #16 - #17 - #18 - #19 - #20
#21 - #22 - #23 - #24 - #25 - #26 - #27 - #28 - #29 - #30
#31 - #32 - #33 - #34 - #35 - #36 - #37 - #38 - #39 - #40
#41 - #42 - #43 - #44 - #45 - #46 - #47 - #48 - #49 - #50
#51 - #52 - #53 - #54 - #55 - #56 - #57 - #58 - #59 - #60
#61 - #62 - #63 - #64 - #65 - #66 - #67 - #68 - #69 - #70
#71 - #72 - #73 - #74 - #75 - #76 - #77 - #78 - #79 - #80
#81

Re-Runs:
#5 #2 - #3 #2 - #10 #2 - #6 #2 - #1 #2 - #11 #2 - #23 + 2* - #16 #2 - #12 #2 - #8 #2 - #5 #3 - #56 #2
* Not hosted by damifortune

SPC

format spinoffs:
#Δ - #Σ - #Θ - #Φ - #Γ - #Ω - #Ψ - #Λ - #Ξ - #Π - #Ε - #Κ - #Α - #Ι - #Β - #Ζ - #Ο - #Ρ - #Η
#Ḁ


You .mid what you want
MSGS MIDI series hosted by BubblegumOctopus designed after kleeder's multi-format series "you get what you want". In this thread, anyone can post a set of 4 MIDI patches, and at some point that set will be chosen as the bitpack: only use those sounds.
beta test - #1 - #2 - #3 - #4 - #5


zlew wildchip batol awooo
A brief wildchip series hosted by mirageofher.
#1 - #2

See also

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Advent Calendar (Battle series)
Battle
OHB
2HB
4HB
XHB