[Unknown Development] #15424715

members (measured 13 Oct 2026, 06:05 UTC)

19 July 2022

created (per Roblox API)

10 August 2026

first measured by this register

OtherEN

Description

Unknown Development Holdings

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

Membership history

Growth

Growth history is still building. We hold one measurement for this entry. A trend needs at least two, taken days apart — so this will fill in on its own rather than being estimated. We do not publish numbers we have not measured.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
12 Aug 2026, 08:30	5	first reading

Ownership

Owned by Helios (@RRiley_y) as measured.

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

Experiences

players in this group’s experiences right now

327

lifetime visits across 4 experiences

State Conference Room0 playing now

192 visits

The Bean 0 playing now

57 visits

Deutsche Autobahn Simulator0 playing now

54 visits

Quezon City, Metro Manila0 playing now

24 visits

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

Members we’ve seen

Helios (@RRiley_y) — The One (rank 255)

@nicoslayergamer — The Few (rank 254)

CaiMontreal (@czerney) — The Unknown (rank 1)

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

Rank structure

The One1

The Few2

Member5

The Unknown4

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.

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[ROPHL] Republic of the Philippines#6251559 · 3 shared members

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[ROPHL] Philippine National Police#11842056 · 3 shared members

Office of the Chief Engineer, AFP#953686802 · 3 shared members

Polarstar Studios#5615635 · 2 shared members

40,596

[JP] Japan#3193073 · 2 shared members

28,403

[UN] United Nations ﾠﾠ#5145516 · 2 shared members

15,325

XJ Studios#6867395 · 2 shared members

9,830

United States οf America Roblox#12238375 · 2 shared members

9,648

ACSM: ACS Modification#7248346 · 2 shared members

6,511

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.