Undertale Boss Rush Calamity Group #457764042

418

members (measured 27 Aug 2026, 22:48 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

12 measurements spanning 16 days, net +27. 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 387–423 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
27 Aug 2026, 08:32	418	-1
25 Aug 2026, 10:13	419	+7
21 Aug 2026, 23:04	412	+1
21 Aug 2026, 10:02	411	+8
18 Aug 2026, 20:10	403	+2
16 Aug 2026, 15:55	401	+1
15 Aug 2026, 01:14	400	+1
13 Aug 2026, 18:18	399	+2
13 Aug 2026, 01:49	397	+4
12 Aug 2026, 00:20	393	+1
11 Aug 2026, 16:05	392	+1
11 Aug 2026, 09:51	391	first reading

Ownership

Owned by @pborg as measured.

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)

Waffles (@WaffleFrog404) — Developer (rank 4)

Script_Ler (@TheForgottenLordT) — Developer (rank 4)

@Finwiggle — Developer (rank 4)

Revert (@dustsans1932) — Composer (rank 3)

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)

YourBestFriend_Vlad (@fs444444) — Member (rank 1)

@koa2h — Tester (rank 1)

RobloxDisabledMyChat (@artemun225) — Member (rank 1)

bandhd (@jyrmathi9) — Tester (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 · 9 shared members

Sans Multiverse & Sans vs Chara#5319738 · 8 shared members

LSPLASH#3049798 · 6 shared members

Chillz Studios#2782840 · 6 shared members

Sol's Studio#8509669 · 6 shared members

FE Studios#5112430 · 6 shared members

Nosniy Games#3461453 · 5 shared members

Scriptbloxian Studios#4705120 · 5 shared members

Bee Swarm Simulator Club#3982592 · 5 shared members

Slap Battles#9950771 · 5 shared members

[B:S] Azure Latch Team#35316274 · 5 shared members

Side Productions#34323581 · 5 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.