SDI Studios #4960504

697

members (measured 9 Oct 2026, 02:50 UTC)

3 June 2019

created (per Roblox API)

10 August 2026

first measured by this register

Game studiosENgame developmenttycoon gamesroleplay games

Description

SDI Studios, established 2019. Creator of Ridgeway County & Coal Mine Tycoon.

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

Membership history

Growth

8 measurements spanning 57 days, net +7. 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 689–698 and does not start at zero.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
6 Oct 2026, 21:04	697	+2
24 Sept 2026, 16:44	695	+1
19 Sept 2026, 02:31	694	+1
16 Sept 2026, 14:28	693	+1
29 Aug 2026, 10:31	692	-1
20 Aug 2026, 05:59	693	+1
17 Aug 2026, 17:36	692	+2
10 Aug 2026, 16:18	690	first reading

Ownership

Owned by Square (@Squareheaddude) 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

139,811

lifetime visits across 1 experiences

[DRIVE TRAINS] Coal Mine Tycoon0 playing now

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

Members we’ve seen

Square (@Squareheaddude) — Lead (rank 255)

@pauljkl — Project Manager (rank 15)

syntax (@syntaxsyntaxsyntax) — Project Manager (rank 15)

Ronald (@Ronalddownload) — Developer (rank 13)

meowmourne (@m_aIpractice) — Developer (rank 13)

@billydurm — Contractor (rank 11)

Tal (@TaIaxn) — Contractor (rank 11)

sourced (@v_masuka) — Contractor (rank 11)

void (@Karuzumi) — Contractor (rank 11)

@SemperBeyond — Contractor (rank 11)

Kumar (@RangeetKumar) — Contractor (rank 11)

@0x_7777 — Quality Assurance (rank 10)

abby (@ab_bae) — Quality Assurance (rank 10)

@bommes — Quality Assurance (rank 10)

@ColonelCarm — Quality Assurance (rank 10)

Cephal (@CephalGPT) — Quality Assurance (rank 10)

@largeTitanic2 — Quality Assurance (rank 10)

Patrick (@clownhonks) — Quality Assurance (rank 10)

bobo (@bohbazinga) — Quality Assurance (rank 10)

mp5 (@mp5sopmods) — Quality Assurance (rank 10)

@brebby — Quality Assurance (rank 10)

@drjack0 — Quality Assurance (rank 10)

@EnforcementBeyond — Quality Assurance (rank 10)

@siteowner — Quality Assurance (rank 10)

@Aerium — Quality Assurance (rank 10)

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

Rank structure

Lead1

Project Manager3

Developer3

Contractor7

Quality Assurance29

Fans647

Member690

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.

State of Ridgeway#6768136 · 80 shared members

State of Firestone#2803360 · 51 shared members

USA | Law Enforcement Training Center#6768340 · 51 shared members

[USA]The United States of America.#758071 · 49 shared members

State οf Mayflowеr#33462869 · 48 shared members

Chillz Studios#2782840 · 39 shared members

State of Ridgemade#35722639 · 39 shared members

State of Mayflower#3403692 · 38 shared members

Car Crushers Community#2726951 · 35 shared members

USA | RCU Corporate Security#33868681 · 34 shared members

Paradoxum Games#4914494 · 33 shared members

REACT Studiosᅠ#17180419 · 33 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.