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@GrumpyCools

@GrumpyCools #114581045

14 March 2016
account created (per Roblox API)
26 Aug 2026, 04:51
last measured (UTC)

Username record

@GrumpyCools — observed 26 August 2026

Roblox’s API lists prior usernames without dates; the dates above are when this register observed each name, which bounds — but is not — the change date.

Groups owned (as measured)

Project: Invasion#11078279
28
The BIRGC#14140591
18
Dunk Incorporated#5483074
17
The Carriage#11921047
6
Ocean Guy Community#583692701
5
The Wandering Death LLC#34872298
5
Glare Interactive#143702644
3
notorious chads#11622377
3
The Scientific Laboratories#5840675
2

Open data

Download this user’s observed record: username history (CSV) · record (JSON)

Also a member of

CRIMCORP#4165692 · Fan
1,120,711
Blox Studiо#4843020 · Member
973,495
Hapless Studios#5502618 · Supporter
838,771
Quantum Science Inc.#2847031 · Employee
484,589
Moonstone Games#8918098 · Member
355,735
Silverstone Horror#33696959 · Member
332,622
Foxtrot Asуlum Rolеplay#5555046 · Legacy Patient
195,779
Roblox Developer Community#10720185 · Developer
179,469
The Noobic Stratocracy#2704934 · Noobs
133,847
Blackout District#6568965 · Member
127,947
Flashstorm#920290 · New Roleplayers
123,994
School Of Developers | ROBLOX DEVs#9658196 · 🧠 | ROBLOX Developers
119,614
Roblox Zooblox#3837595 · Tour Guides
109,089
Canadian Roleplay Community#4574067 · Community Member
54,998
Left 4 Survival Community#3507485 · Fans
47,988
Anarchy's Apocalyptic Apparel#2713017 · Clientele
32,031
The Walking Dead: Roleplay#5250797 · Survivor
16,811
CRC: Ottawa Fire Services#4574079 · Candidate
16,257
Orange Colored Skies#8027732 · Drifter
15,881
Roblox Remakes#4836278 · Player
14,476
Federal Republic of Noobia#17049589 · Citizen
13,655
Team Lapis#3745272 · Roleplayers
11,816
Roblox DevForum Community#3514227 · Member
10,896
HaloCommunity#7778299 · Members
9,567
Project Spark Reimagined#2684323 · Supporter
6,818
Federal Ground Defense Force#35997119 · Private
6,564
[ Wasteland Blues ]#33049614 · Wastelander
5,240
Tidal Interactive#15542765 · Member
3,616
The 17th Frog Apparel Brigade#6459078 · cool people
2,135
The Roaming Dead Roleplay Community#5337292 · Survivor
2,083
Hyland Garrick#8083051 · New Member
1,785
Federal Mexicо#7914203 · Miembro Retirado
954
[ATF] Coyotes#4967183 · Underboss
778
Afterdawn Studios#15749852 · Roleplayer
475
-22° and Dropping...Community Group#2768158 · Players
451
Project Halfmoon#9026791 · Member
394
Empire State оf Mind#16011461 · Supporter
377
|Volt's Private Investigators|#5058969 · -Administrators-
362
Cube Advisory Board#12167013 · Roleplayers
361
[ATF] The New Model Army#34762127 · Infantryman
361
Saphire center#5228938 · -Founder of Saphire Center-
159
Cliffside Passage Community Board#6239858 · Member
154
Nueva Sonora#12348551 · Sonoran Legend
152
Dial-Up Community!#14466423 · Community Member
151
{ M.C.A. }#7392650 · Member
138
Project Juno#5448814 · Cool People
127
Inferno Studios Hub#8719505 · Roleplayer
111
Community Developer Hub#9104921 · Management
111
Vault Technologies#7407313 · Vault Dweller
100
A Hunter's Refuge#8331413 · Honorary
94
Thundersnow Advisory Board#15522687 · Roleplayer
93
Gateway ; Community#16287041 · 2
49
La-li-Iu-Ie-Io#7721054 · Rosemary AI
45
Fallout: Project Poseidon#13462709 · Founders
42
The Last Sunshine#9102107 · Member
31
Vanguard Studio INC.#11950232 · Supporter
30
Crowkeeping#33945171 · Crow
30
Solstol Studios#14366079 · Roleplayer
28
Atomic Winter [атом]#16976187 · Roleplayer
28
CyberCrown#13520408 · GrumpyGuy
26
WL Development Team#11549994 · Manager
24
High Rise Community#8740704 · Member
22
The Aftermath Game Board#7646839 · Supporter
18
The boahs#7322491 · The Homies
18
cyborg5858 fan club#34754000 · cyborg5858
16
- 𝐂𝐚𝐞𝐬𝐚𝐫'𝐬 𝐋𝐞𝐠𝐢𝐨𝐧 -#4315190 · Legion Youth
16
THE PROHIBITED#7768547 · lurker
16
Commission1ꭄ#5721505 · Member
14
Disturbance 49#11542027 · Developer
14
The Offical MASK Group.#17159866 · Helped make game
11
Project Lonestar#33394452 · Vice Directors
9
Project: Banana Split#34013721 · BUILDERS
9
Gamer Legion (Official Group)#5305029 · Member
8
Outer Heаven#4108382 · noobs
8
Blair Interactive#34765311 · Vice Directors
7
The Red Knave#3309675 · Crewman
7
ZOMBLOX game#34102494 · Developer
7
Armored Patrol Classic#34132769 · Admin
7
Grasslands Advisory Board#33322885 · Roleplayer
6
Phantom Limbs Advisory Board#32735591 · Admin
5
the walking alivers#34629037 · working aliver
4
DroidTech#10477910 · Co-Owner
3

Membership and rank as measured from this user’s public group list.