BotB has had a lot of different XHB series in the past years. This article tries to list at least the most successful and commonly known ones.

'[#[Summer Allgear Series]
The Summer Allgear Series is a notable '[[XHB] series ran by '[l[https://battleofthebits.com/barracks/Profile/hanna/[hanna] during the season of summer. It is considered the XHB counterpart to '[[Summer Chip], in that it mainly uses the '[[allgear (format)[allgear] format for submissions, as opposed to the regular chipist formats used in Summer Chip.

- '[b]SUMMER ALLGEAR SERIES'[/b] (June - September 2020)
'[l[https://battleofthebits.com/arena/XHB/4797/[#1] - '[l[https://battleofthebits.com/arena/XHB/4802/[#2] - '[l[https://battleofthebits.com/arena/XHB/4808/[#3] - '[l[https://battleofthebits.com/arena/XHB/4822/[#4] - '[l[https://battleofthebits.com/arena/XHB/4826/[#5] - '[l[https://battleofthebits.com/arena/XHB/4837/[#6] - '[l[https://battleofthebits.com/arena/XHB/4888/[#7] - '[l[https://battleofthebits.com/arena/XHB/4930/[#8] - '[l[https://battleofthebits.com/arena/XHB/4963/[#9] - '[l[https://battleofthebits.com/arena/XHB/5000/[#10] - '[l[https://battleofthebits.com/arena/XHB/5050/[#11] - '[l[https://battleofthebits.com/arena/XHB/5080/[#12] - '[l[https://battleofthebits.com/arena/XHB/5113/[#13] - '[l[https://battleofthebits.com/arena/XHB/5136/[#14]

'[#[Fallgear]
The sequel to the Summer Allgear Series, an '[[allgear (format)[allgear] series hosted by '[l[https://battleofthebits.com/barracks/Profile/hanna/[hanna] in lieu of a proper autumn-themed allgear major.
'[l[https://battleofthebits.com/arena/XHB/5166/[#1]

'[#[Sample Pack Series]
First hosted by '[l[https://battleofthebits.com/barracks/Profile/hanna/[hanna], later by '[l[https://battleofthebits.com/barracks/Profile/damifortune/[damifortune], this is a series of '[[remix (format)[remix] OHBs hosted as a BotB equivalent to the '[l[https://samplepackcontest.bandcamp.com/[Sample Pack Contest] series hosted by VGMusic.com.
'[l[https://battleofthebits.com/arena/XHB/4946/[#1] - '[l[https://battleofthebits.com/arena/XHB/4958/[#2] - '[l[https://battleofthebits.com/arena/XHB/4960/[#3] - '[l[https://battleofthebits.com/arena/XHB/4970/[#4] - '[l[https://battleofthebits.com/arena/XHB/4995/[#5] - '[l[https://battleofthebits.com/arena/XHB/4997/[#6] - '[l[https://battleofthebits.com/arena/XHB/5002/[#7] - '[l[https://battleofthebits.com/arena/XHB/5034/[#8] - '[l[https://battleofthebits.com/arena/XHB/5061/[#9] - '[l[https://battleofthebits.com/arena/XHB/5071/[#10] - '[l[https://battleofthebits.com/arena/XHB/5122/[#11] - '[l[https://battleofthebits.com/arena/XHB/5133/[#12] - '[l[https://battleofthebits.com/arena/XHB/5158/[#13]

'[#[Vav's Lunch Break]
Mostly hosted by '[l[https://battleofthebits.com/barracks/Profile/Vav/[Vav] this is a series of allgear/fakebit/wildchip XHBs, done in lieu of XHB activity.
'[l[https://battleofthebits.com/arena/XHB/4827/[#1] - '[l[https://battleofthebits.com/arena/XHB/4830/[#2] - '[l[https://battleofthebits.com/arena/XHB/4833/[#3] - '[l[https://battleofthebits.com/arena/XHB/4835/[#4] - '[l[https://battleofthebits.com/arena/XHB/4838/[#5] - '[l[https://battleofthebits.com/arena/XHB/4841/[#6] - '[l[https://battleofthebits.com/arena/XHB/4852/[#7] - '[l[https://battleofthebits.com/arena/XHB/4906/[#8] - '[l[https://battleofthebits.com/arena/XHB/5008/[#9] - '[l[https://battleofthebits.com/arena/XHB/5067/[#10] - '[l[https://battleofthebits.com/arena/XHB/5093/[#11] - '[l[https://battleofthebits.com/arena/XHB/5096/[#12] - '[l[https://battleofthebits.com/arena/XHB/5120/[#13]

'[#[The Ultimate Hum]
A '[[wildchip (format)[wildchip] 4HB project organized by '[l[https://battleofthebits.com/barracks/Profile/Maximemoring/[Maximemoring] (who also streams '[[synclisten]s of it) and hosted by '[l[https://battleofthebits.com/barracks/Profile/puke7/[puke7].

- '[b]The Ultimate Hum'[/b] (August 2020, ongoing)
'[l[https://battleofthebits.com/arena/XHB/4948/[#1] - '[l[https://battleofthebits.com/arena/XHB/4985/[#2] - '[l[https://battleofthebits.com/arena/XHB/5026/[#3] - '[l[https://battleofthebits.com/arena/XHB/5069/[#4] - '[l[https://battleofthebits.com/arena/XHB/5098/[#5] - '[l[https://battleofthebits.com/arena/XHB/5128/[#6] - '[l[https://battleofthebits.com/arena/XHB/5150/[#7] - '[l[https://battleofthebits.com/arena/XHB/5186/[#8]

There's a lot more to it than meets the eye here. For more information, read these bulletins: '[l[http://battleofthebits.com/academy/GroupThread/24472/[Rules & Current state], '[l[https://battleofthebits.com/academy/GroupThread/24695/[How revenue works]

'[#[Soundtrack Sessions]
A small '[[nsf (format)[nsf]-OHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/ElHuesudoII/[ElHuesudoII] in 2014.
'[l[https://battleofthebits.com/arena/XHB/2066/[#1] - '[l[https://battleofthebits.com/arena/XHB/2069/[#2] - '[l[https://battleofthebits.com/arena/XHB/2074/[#3] - '[l[https://battleofthebits.com/arena/XHB/2085/[#4]

'[#[colours]
A small visual-related OHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/sean/[sean].
'[l[https://battleofthebits.com/arena/XHB/4895/[#1] - '[l[https://battleofthebits.com/arena/XHB/5013/[#2] - '[l[https://battleofthebits.com/arena/XHB/5041/[#3] - '[l[https://battleofthebits.com/arena/XHB/5073/[#4] - '[l[https://battleofthebits.com/arena/XHB/5193/[#5]

'[#[BOTBtober]
A small OHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/Sinc-X/[Sinc-X] at the end of October. While 2016 was entirely allgear-based, 2017 varied between the formats.

- '[b]BOTBtober 2016'[/b]
'[l[https://battleofthebits.com/arena/XHB/3200/[#1] - '[l[https://battleofthebits.com/arena/XHB/3201/[#2] - '[l[https://battleofthebits.com/arena/XHB/3203/[#3] - '[l[https://battleofthebits.com/arena/XHB/3206/[#4] - '[l[https://battleofthebits.com/arena/XHB/3209/[#5]

- '[b]BOTBtober 2017'[/b]
'[l[https://battleofthebits.com/arena/XHB/3562/['[icon[formats/allgear] #1] - '[l[https://battleofthebits.com/arena/XHB/3564/['[icon[formats/sample] #2A] - '[l[https://battleofthebits.com/arena/XHB/3565/['[icon[formats/remix] #2B] - '[l[https://battleofthebits.com/arena/XHB/3566/['[icon[formats/zxbeep] #3] - '[l[https://battleofthebits.com/arena/XHB/3568/['[icon[formats/wildchip] #4] - '[l[https://battleofthebits.com/arena/XHB/3569/['[icon[formats/sid] #5]

'[#[Badge Quest]
OHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/Chip+Champion/[Chip Champion] as a part of his badge completionist collecting.
'[l[https://battleofthebits.com/arena/XHB/3008/['[icon[formats/sap] #1] - '[l[https://battleofthebits.com/arena/XHB/3016/['[icon[formats/sapx2] #2] - '[l[https://battleofthebits.com/arena/XHB/3018/['[icon[formats/nsf_classic] #3] - '[l[https://battleofthebits.com/arena/XHB/3039/['[icon[formats/gameboy] #4] - '[l[https://battleofthebits.com/arena/XHB/3042/['[icon[formats/deflemask] #5] - '[l[https://battleofthebits.com/arena/XHB/3045/['[icon[formats/hes] #6] - '[l[https://battleofthebits.com/arena/XHB/3068/['[icon[formats/tia] #7] - '[l[https://battleofthebits.com/arena/XHB/3311/['[icon[formats/gameboy] #8] - '[l[https://battleofthebits.com/arena/XHB/3349/['[icon[formats/draw] #9] - '[l[https://battleofthebits.com/arena/XHB/3759/['[icon[formats/nsf_classic] #10] - '[l[https://battleofthebits.com/arena/XHB/4141/['[icon[formats/ansi] #11]

'[#[Rare Format Sighting]
OHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/Jangler/[Jangler] first and other people later.
'[l[https://battleofthebits.com/arena/XHB/1783/['[icon[formats/panda] #1] - '[l[https://battleofthebits.com/arena/XHB/1803/['[icon[formats/ntrq] #2] - '[l[https://battleofthebits.com/arena/XHB/1814/['[icon[formats/fsound] #3] - '[l[https://battleofthebits.com/arena/XHB/1822/['[icon[formats/html] #4] - '[l[https://battleofthebits.com/arena/XHB/1829/['[icon[formats/channelf] #5] - '[l[https://battleofthebits.com/arena/XHB/1839/['[icon[formats/svg] #6] - '[l[https://battleofthebits.com/arena/XHB/1863/['[icon[formats/sunvox] #7] - '[l[https://battleofthebits.com/arena/XHB/3189/['[icon[formats/ahx] #8] - '[l[https://battleofthebits.com/arena/XHB/3190/['[icon[formats/mod12k] #9] - '[l[https://battleofthebits.com/arena/XHB/4161/['[icon[formats/pc-x801] #10]

'[#[CastleNes Series]
'[l[https://battleofthebits.com/barracks/Profile/CastleNes/[CastleNes] has hosted a plethora of XHB series, starting when he got his first badge.

- '[b]Quest Awaiting'[/b]
'[l[https://battleofthebits.com/arena/XHB/4917/[#1] - '[l[https://battleofthebits.com/arena/XHB/5051/[#2] - '[l[https://battleofthebits.com/arena/XHB/5070/[#3]

- '[b]Darker Than Night'[/b]
'[l[https://battleofthebits.com/arena/XHB/5009/[#1] - '[l[https://battleofthebits.com/arena/XHB/5102/[#2]

- '[b]From The Past'[/b]
'[l[https://battleofthebits.com/arena/XHB/5027/[#1] - '[l[https://battleofthebits.com/arena/XHB/5101/[#2] - '[l[https://battleofthebits.com/arena/XHB/5134/[#3]

- '[b]BotBer arts'[/b]
'[l[https://battleofthebits.com/arena/XHB/5044/[#1] - '[l[https://battleofthebits.com/arena/XHB/5087/[#2] - '[l[https://battleofthebits.com/arena/XHB/5089/[#3] - '[l[https://battleofthebits.com/arena/XHB/5119/[#4] - '[l[https://battleofthebits.com/arena/XHB/5142/[#5] - '[l[https://battleofthebits.com/arena/XHB/5185[#6]

- '[b]Theme Allgear'[/b]
'[l[https://battleofthebits.com/arena/XHB/5064/[#1]

- '[b]Short Circuit'[/b]
'[l[https://battleofthebits.com/arena/XHB/5103/[#1]

- '[b]Synth City'[/b]
'[l[https://battleofthebits.com/arena/XHB/5105/[#1] - '[l[https://battleofthebits.com/arena/XHB/5143/[#2]

- '[b]Theme Pixel'[/b]
'[l[https://battleofthebits.com/arena/XHB/5131/[#1]

'[#[Level Music]
An XHB-series hosted by '[l[https://battleofthebits.com/barracks/Profile/OminPigeonMaster/[OminPigeonMaster]. It is considered the longest themed XHB series in existance, spanning '[-s]55.555'[/-s] 58 battles.
'[l[https://battleofthebits.com/arena/XHB/4453/[#1] - '[l[https://battleofthebits.com/arena/XHB/4458/[#2] - '[l[https://battleofthebits.com/arena/XHB/4459/[#3] - '[l[https://battleofthebits.com/arena/XHB/4460/[#4] - '[l[https://battleofthebits.com/arena/XHB/4464/[#5] - '[l[https://battleofthebits.com/arena/XHB/4465/[#6] - '[l[https://battleofthebits.com/arena/XHB/4476/[#7] - '[l[https://battleofthebits.com/arena/XHB/4478/[#8] - '[l[https://battleofthebits.com/arena/XHB/4483/[#9] - '[l[https://battleofthebits.com/arena/XHB/4484/[#10] - '[l[https://battleofthebits.com/arena/XHB/4492/[#11] - '[l[https://battleofthebits.com/arena/XHB/4493/[#12] - '[l[https://battleofthebits.com/arena/XHB/4498/[#13] - '[l[https://battleofthebits.com/arena/XHB/4499/[#14] - '[l[https://battleofthebits.com/arena/XHB/4506/[#15] - '[l[https://battleofthebits.com/arena/XHB/4509/[#16] - '[l[https://battleofthebits.com/arena/XHB/4511/[#17] - '[l[https://battleofthebits.com/arena/XHB/4515/[#18] - '[l[https://battleofthebits.com/arena/XHB/4517/[#19] - '[l[https://battleofthebits.com/arena/XHB/4521/[#20] - '[l[https://battleofthebits.com/arena/XHB/4524/[#21] - '[l[https://battleofthebits.com/arena/XHB/4527/[#22] - '[l[https://battleofthebits.com/arena/XHB/4530/[#23] - '[l[https://battleofthebits.com/arena/XHB/4531/[#24] - '[l[https://battleofthebits.com/arena/XHB/4532/[#25] - '[l[https://battleofthebits.com/arena/XHB/4538/[#26] - '[l[https://battleofthebits.com/arena/XHB/4541/[#27] - '[l[https://battleofthebits.com/arena/XHB/4548/[#28] - '[l[https://battleofthebits.com/arena/XHB/4549/[#29] - '[l[https://battleofthebits.com/arena/XHB/4552/[#30] - '[l[https://battleofthebits.com/arena/XHB/4555/[#31] - '[l[https://battleofthebits.com/arena/XHB/4561/[#32] - '[l[https://battleofthebits.com/arena/XHB/4562/[#33] - '[l[https://battleofthebits.com/arena/XHB/4566/[#34] - '[l[https://battleofthebits.com/arena/XHB/4569/[#35] - '[l[https://battleofthebits.com/arena/XHB/4573/[#36] - '[l[https://battleofthebits.com/arena/XHB/4578/[#37] - '[l[https://battleofthebits.com/arena/XHB/4593/[#38] - '[l[https://battleofthebits.com/arena/XHB/4605/[#39] - '[l[https://battleofthebits.com/arena/XHB/4622/[#40] - '[l[https://battleofthebits.com/arena/XHB/4654/[#41] - '[l[https://battleofthebits.com/arena/XHB/4666/[#42] - '[l[https://battleofthebits.com/arena/XHB/4679/[#43] - '[l[https://battleofthebits.com/arena/XHB/4682/[#44] - '[l[https://battleofthebits.com/arena/XHB/4686/[#45] - '[l[https://battleofthebits.com/arena/XHB/4694/[#46] - '[l[https://battleofthebits.com/arena/XHB/4722/[#47] - '[l[https://battleofthebits.com/arena/XHB/4739/[#48] - '[l[https://battleofthebits.com/arena/XHB/4748/[#49] - '[l[https://battleofthebits.com/arena/XHB/4786/[#50] - '[l[https://battleofthebits.com/arena/XHB/4814/[#51] - '[l[https://battleofthebits.com/arena/XHB/4823/[#52] - '[l[https://battleofthebits.com/arena/XHB/4846/[#53] - '[l[https://battleofthebits.com/arena/XHB/4864/[#54] - '[l[https://battleofthebits.com/arena/XHB/4920/[#55] - '[l[https://battleofthebits.com/arena/XHB/5031/[#55.5] - '[l[https://battleofthebits.com/arena/XHB/5036/[#55.55] - '[l[https://battleofthebits.com/arena/XHB/5112/[#55.555]

'[#[See Also]
'[[Advent Calendar (Battle series)]
'[[Battle]
'[[OHB]
'[[2HB]
'[[4HB]
'[[XHB]