Roblox RegisterIndependent record of Roblox groups · not affiliated with Roblox Corporation
Extreme DeveIopment

Extreme DeveIopment #698282219

30
members (measured 13 Oct 2026, 04:51 UTC)
12 May 2026
created (per Roblox API)
11 August 2026
first measured by this register

OtherENcasualsociallow_activity

Description

Group for verified creators only Banned members: Voizaria

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

Membership history

Growth

3010366.511 August 2026 — 94 members15 August 2026 — 95 members18 August 2026 — 96 members21 August 2026 — 97 members24 August 2026 — 99 members3 September 2026 — 102 members7 September 2026 — 103 members11 September 2026 — 102 members13 October 2026 — 30 members11 August 202613 October 2026
9 measurements spanning 63 days, net -64. 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 19–114 and does not start at zero.
Measurement log — every members count we have recorded
Measured (UTC)MembersChange
13 Oct 2026, 04:5130-72
11 Sept 2026, 21:37102-1
7 Sept 2026, 00:56103+1
3 Sept 2026, 22:02102+3
24 Aug 2026, 17:4399+2
21 Aug 2026, 00:0197+1
18 Aug 2026, 22:0396+1
15 Aug 2026, 09:5595+1
11 Aug 2026, 13:1394first reading

Ownership

Owned by Telamons (@brighter_787) 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
3,804
lifetime visits across 35 experiences
[CONTENT DELETED]0 playing now
1,152 visits
+1 Speed Keyboard Escape MODDED [Early Access]0 playing now
345 visits
👻steal a brainrot 0 playing now
294 visits
Steal a Mystery0 playing now
273 visits
Very Secret Keyboard Game0 playing now
255 visits
[🌊] Grow a Garden 🌶️0 playing now
230 visits
Become Spongebob!0 playing now
214 visits
[ Content Deleted ]0 playing now
165 visits
Grow a Farm 20 playing now
134 visits
Escape The Backrooms!0 playing now
129 visits
[INDEV] Zombie Attack!0 playing now
118 visits
MechaCubes! [CODES]0 playing now
97 visits
[INDEV] Kick a lucky block0 playing now
59 visits
The Backrooms 2 - Level 40010 playing now
45 visits
Swing For Brainrots!0 playing now
37 visits
Slime RNG0 playing now
30 visits
Fears To Fathom0 playing now
22 visits
SCP: Site 1030 playing now
21 visits
Test1230 playing now
20 visits
Plants & Brainrots0 playing now
19 visits
Lazer Tag Royale 20 playing now
18 visits
Make your own game using AI!0 playing now
17 visits
[ALPHA TESTING] +1 Speed Obby Escape!0 playing now
13 visits
SCP-096 [Demonstration]0 playing now
11 visits
Midnight Hours Game0 playing now
11 visits
Roblox & Racing0 playing now
10 visits
Accelerate V40 playing now
10 visits
Steal a brainrot [TESTING PLACE]0 playing now
10 visits
Space Frontier[TEST]0 playing now
10 visits
Enhanced Settings0 playing now
9 visits
The Avatar Shop!0 playing now
9 visits
ASMR Squishys!0 playing now
8 visits
AFK or Play0 playing now
6 visits
D-Day0 playing now
3 visits
1+ speed escape fixed0 playing now
0 visits

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

Members we’ve seen

Telamons (@brighter_787) — Do _ Extreme (rank 255)

OG_Chesseball979 (@Chesseball979) — Management (rank 252)

pmR (@Graysonlilguy) — Management (rank 252)

Cosmic (@kulraj678) — Management (rank 252)

TherealZioles (@Zioles2689) — OG (rank 251)

dualmags (@BigJax323) — OG (rank 251)

@Ellsswat — Contributor (rank 249)

ykaaronDEV (@1013_aaron) — Roblox Admins (rank 248)

Menu (@Golden_pumpkin67) — Roblox Admins (rank 248)

ModdedGames (@moddedgame10) — Analytics (rank 242)

Gary (@NotBluePoolTeck) — Extreme (rank 1)

RyRy (@RyanatWimbledon) — Brighter & Rio Fan (rank 1)

chip (@mr_cat101010) — Brighter & Rio Fan (rank 1)

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

Rank structure

Do _ Extreme2
Rio1
Development3
Do _ Large2
Management10
Ray-Ray Programming2
OG10
Contributor4
Roblox Admins4
Trusted Admin5
Translator2
Friends4
Analytics2
Best Friend3
Verified2
Brighter & Rio Fan94
Extreme6
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.

Nosniy Games#3461453 · 9 shared members
57,958,085
The Garden Game#35789249 · 9 shared members
19,477,797
SecretVerse Studio#1074557114 · 8 shared members
141,110,614
Wiggity.#12836673 · 7 shared members
30,983,266
Strawberreh Squad#432538536 · 7 shared members
2,082,631
Yielding Arts#12013007 · 6 shared members
24,989,929
Quataun#12121240 · 6 shared members
18,319,570
Catalog Avatar Creator#15102943 · 5 shared members
45,110,954
lol games..#12208023 · 5 shared members
34,956,447
Roblox#7 · 5 shared members
13,508,397
Splitting Point - PVB#34869880 · 5 shared members
9,918,660
Dani01 Studios#35203067 · 5 shared members
137,064

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.