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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
notorious chads#11622377
3
Glare Interactive#143702644
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
1,160,385
Blox Studiо#4843020 · Member
974,216
Hapless Studios#5502618 · Supporter
847,142
Quantum Science Inc.#2847031 · Employee
485,828
Moonstone Games#8918098 · Member
369,580
Silverstone Horror#33696959 · Member
332,253
Foxtrot Asуlum Rolеplay#5555046 · Legacy Patient
195,566
Roblox Developer Community#10720185 · Developer
186,272
The Noobic Stratocracy#2704934 · Noobs
138,994
Blackout District#6568965 · Member
128,651
Flashstorm#920290 · New Roleplayers
124,325
School Of Developers | ROBLOX DEVs#9658196 · 🧠 | ROBLOX Developers
119,449
Roblox Zooblox#3837595 · Tour Guides
108,998
Canadian Roleplay Community#4574067 · Community Member
54,896
Left 4 Survival Community#3507485 · Fans
47,902
Anarchy's Apocalyptic Apparel#2713017 · Clientele
32,137
The Walking Dead: Roleplay#5250797 · Survivor
16,794
CRC: Ottawa Fire Services#4574079 · Candidate
16,212
Orange Colored Skies#8027732 · Drifter
15,842
Roblox Remakes#4836278 · Player
14,670
Federal Republic of Noobia#17049589 · Citizen
13,628
Team Lapis#3745272 · Roleplayers
11,841
Roblox DevForum Community#3514227 · Member
10,866
HaloCommunity#7778299 · Members
9,705
Project Spark Reimagined#2684323 · Supporter
6,843
Federal Ground Defense Force#35997119 · Private
6,478
[ Wasteland Blues ]#33049614 · Wastelander
5,183
Tidal Interactive#15542765 · Member
3,803
The 17th Frog Apparel Brigade#6459078 · cool people
2,143
The Roaming Dead Roleplay Community#5337292 · Survivor
2,080
Hyland Garrick#8083051 · New Member
1,787
Federal Mexicо#7914203 · Miembro Retirado
950
[ATF] Coyotes#4967183 · Underboss
783
Afterdawn Studios#15749852 · Roleplayer
473
-22° and Dropping...Community Group#2768158 · Players
457
Project Halfmoon#9026791 · Member
393
Empire State оf Mind#16011461 · Supporter
378
|Volt's Private Investigators|#5058969 · -Administrators-
362
Cube Advisory Board#12167013 · Roleplayers
360
[ATF] The New Model Army#34762127 · Infantryman
358
Saphire center#5228938 · -Founder of Saphire Center-
159
Cliffside Passage Community Board#6239858 · Member
153
Dial-Up Community!#14466423 · Community Member
152
Nueva Sonora#12348551 · Sonoran Legend
151
{ M.C.A. }#7392650 · Member
138
Project Juno#5448814 · Cool People
127
Inferno Studios Hub#8719505 · Roleplayer
111
Community Developer Hub#9104921 · Management
110
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
Crowkeeping#33945171 · Crow
30
Vanguard Studio INC.#11950232 · Supporter
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 boahs#7322491 · The Homies
18
The Aftermath Game Board#7646839 · Supporter
18
cyborg5858 fan club#34754000 · cyborg5858
16
- 𝐂𝐚𝐞𝐬𝐚𝐫'𝐬 𝐋𝐞𝐠𝐢𝐨𝐧 -#4315190 · Legion Youth
16
THE PROHIBITED#7768547 · lurker
16
Disturbance 49#11542027 · Developer
14
Commission1ꭄ#5721505 · Member
14
The Offical MASK Group.#17159866 · Helped make game
11
Project: Banana Split#34013721 · BUILDERS
9
Project Lonestar#33394452 · Vice Directors
9
Outer Heаven#4108382 · noobs
8
Gamer Legion (Official Group)#5305029 · Member
8
ZOMBLOX game#34102494 · Developer
7
The Red Knave#3309675 · Crewman
7
Armored Patrol Classic#34132769 · Admin
7
Blair Interactive#34765311 · Vice Directors
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.