Undertale Boss Rush Calamity Group #457764042

449

members (measured 16 Oct 2026, 23:05 UTC)

15 April 2026

created (per Roblox API)

11 August 2026

first measured by this register

Game fan groupsENgamingundertaleboss rush

Description

Believe it or not, but this MIGHT be the ubrc group

Written by the group; not a statement by this register.

Membership history

Growth

30 measurements spanning 66 days, net +58. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 382–458 and does not start at zero.

Measurement log — every members count we have recorded, most recent 20 of 30
Measured (UTC)	Members	Change
16 Oct 2026, 19:24	449	+2
14 Oct 2026, 20:29	447	+4
11 Oct 2026, 13:59	443	+2
10 Oct 2026, 00:12	441	-2
7 Oct 2026, 22:38	443	+3
1 Oct 2026, 10:51	440	+2
27 Sept 2026, 06:55	438	+1
22 Sept 2026, 00:24	437	+1
21 Sept 2026, 05:29	436	+1
20 Sept 2026, 11:08	435	+1
18 Sept 2026, 13:28	434	+2
13 Sept 2026, 22:26	432	+1
13 Sept 2026, 09:57	431	+2
11 Sept 2026, 13:58	429	-1
8 Sept 2026, 07:53	430	+4
5 Sept 2026, 15:07	426	+1
3 Sept 2026, 03:06	425	+3
29 Aug 2026, 17:55	422	+4
27 Aug 2026, 08:32	418	-1
25 Aug 2026, 10:13	419	first reading

Ownership

Owned by @pborg as measured.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Experiences

0

players in this group’s experiences right now

360

lifetime visits across 1 experiences

Donation Game0 playing now

Experiences this group owns, by lifetime visits. Live-player counts are from our last measurement.

Members we’ve seen

@pborg — Head developer (rank 255)

@Finwiggle — Developer (rank 4)

Waffles (@WaffleFrog404) — Developer (rank 4)

Script_Ler (@TheForgottenLordT) — Developer (rank 4)

Revert (@dustsans1932) — Composer (rank 3)

demaro (@denydemaro) — Contributor (rank 2)

YourBestFriend_Vlad (@fs444444) — Member (rank 1)

@koa2h — Tester (rank 1)

RobloxDisabledMyChat (@artemun225) — Member (rank 1)

bandhd (@jyrmathi9) — Tester (rank 1)

sir_criminal (@TechnicTundra94) — Member (rank 1)

eri (@Eriberate) — Tester (rank 1)

Vergil (@uioutecxjrs) — Member (rank 1)

NEET (@fangamer122) — Member (rank 1)

@DLB_Bot3 — Member (rank 1)

@haru04211 — Member (rank 1)

Smiling_Green (@Lysanderman01) — Member (rank 1)

Ice (@victormaster3) — Member (rank 1)

HyperDustSans (@yayagamer502) — Member (rank 1)

RealOMNi_Sans (@Alexina_Dash2) — Member (rank 1)

matey (@JustA_NormalOgPlayer) — Member (rank 1)

@MiniTricko — Member (rank 1)

WheresMyBaccy (@Slog777) — Member (rank 1)

TehEpic_Duck (@TehEpicDuc_k) — Member (rank 1)

sans (@ASadAxolotl) — Member (rank 1)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

Head developer1

Developer3

Composer3

Contributor4

Member393

Tester18

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

Paradoxum Games#4914494 · 29 shared members

LSPLASH#3049798 · 28 shared members

Chillz Studios#2782840 · 28 shared members

Sol's Studio#8509669 · 26 shared members

Bee Swarm Simulator Club#3982592 · 24 shared members

Wiggity.#12836673 · 22 shared members

Scriptbloxian Studios#4705120 · 22 shared members

Nosniy Games#3461453 · 20 shared members

Slap Battles#9950771 · 19 shared members

Sans Multiverse & Sans vs Chara#5319738 · 19 shared members

Side Productions#34323581 · 19 shared members

Lad's Doodle Sphere#5668366 · 19 shared members

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.