Sega used T-series codes to identify officially licensed third party developers. ROM headers of games developed by a third party (except those that Sega contracts out, such as Nextech) usually contain a field stating the T-series code. For example, the sixteen bytes at offset $110 (hex) of Sega Mega Drive game ROMs would usually look like one of
(C)SEGA year.mon
(C)T-xx year.mon
(C)T-xxxyear.mon
(C)Txxx year.mon
Not all third party developers/publishers have followed these rules; for example, Psygnosis, Kaneko, Taito, and Treco have placed their company name in the field on several occasions.
| T-Code
|
Developer
|
| T-11 |
Taito
|
| T-12 |
Capcom
|
| T-13 |
Data East
|
| T-14 |
Namco
|
| T-15 |
Sunsoft
|
| T-16 |
Ma-Ba
|
| T-17 |
Dempa
|
| T-18 |
Tecno Soft
|
| T-19 |
Tecno Soft
|
| T-20 |
Asmik
|
| T-21 |
ASCII
|
| T-22 |
Micronet
|
| T-23 |
VIC Tokai
|
| T-24 |
Treco/Sammy
|
| T-25 |
NCS/Masaya
|
| T-26 |
Sigma Enterprises
|
| T-27 |
Toho
|
| T-28 |
HOT-B
|
| T-29 |
Kyugo
|
| T-30 |
Video System
|
| T-31 |
SNK
|
| T-32 |
Wolf Team
|
| T-33 |
Kaneko
|
| T-34 |
DreamWorks
|
| T-35 |
Toaplan (MUSHA JP), Seismic, Compile
|
| T-36 |
Tecmo
|
| T-37 |
|
| T-38 |
Sanritsu
|
| T-39 |
|
| T-40 |
Toaplan
|
| T-41 |
UNIPACC
|
| T-42 |
UPL
|
| T-43 |
Human
|
| T-44 |
Sanritsu/SIMS
|
| T-45 |
Game Arts
|
| T-46 |
Kodansha Research Institute
|
| T-47 |
Sage's Creation
|
| T-48 |
Tengen, Time Warner Interactive
|
| T-49 |
Telenet Japan
|
| T-50 |
Electronic Arts
|
| T-51 |
Microcabin
|
| T-52 |
SystemSoft
|
| T-53 |
Riverhillsoft
|
| T-54 |
Face
|
| T-55 |
Nuvision
|
| T-56 |
Razorsoft
|
| T-57 |
Jaleco
|
| T-58 |
Visco
|
| T-59 |
|
| T-60 |
Victor Musical Industries/Victor Entertainment/Victor Soft
|
| T-61 |
Wonder Amusement Studio
|
| T-62 |
Sony Imagesoft
|
| T-63 |
Toshiba EMI
|
| T-64 |
IGS > Data West
|
| T-65 |
Tsukuda Ideal (Tsukuda Original (TODO confirm))
|
| T-66 |
Compile
|
| T-67 |
Magical
|
| T-68 |
CSK Research Institute (CRI)
|
| T-69 |
Arena
|
| T-70 |
Virgin Interactive
|
| T-71 |
Nihon Bussan (Nichibutsu)
|
| T-72 |
Varie
|
| T-73 |
Coconuts Japan, Soft Vision
|
| T-74 |
PALSOFT
|
| T-75 |
Pony Canyon
|
| T-76 |
Koei
|
| T-77 |
Sur De Wave
|
| T-78 |
|
| T-79 |
U.S. Gold
|
| T-80 |
|
| T-81 |
Flying Edge/Acclaim
|
| T-82 |
|
| T-83 |
GameTek
|
| T-84 |
GameTek
|
| T-85 |
PCM Complete
|
| T-86 |
Absolute Entertainment
|
| T-87 |
Mindscape/Software Toolworks
|
| T-88 |
Domark
|
| T-89 |
Parker Brothers
|
| T-90 |
|
| T-91 |
Pack-In-Video/Pack-In-Soft/Victor Soft/Victor Interactive Software
|
| T-92 |
Sandstorm > Polydor K.K.
|
| T-93 |
Sony
|
| T-94 |
|
| T-95 |
Konami
|
| T-96 |
|
| T-97 |
Tradewest/Williams Entertainment/Midway Games
|
| T-98 |
|
| T-99 |
Success
|
| T-100 |
Black Pearl Software/THQ
|
| T-101 |
TecMagik
|
| T-102 |
|
| T-103 |
Takara
|
| T-104 |
|
| T-105 |
Shogakukan Production
|
| T-106 |
Electronic Arts Victor
|
| T-107 |
Electro Brain
|
| T-108 |
|
| T-109 |
Saddleback Graphics
|
| T-110 |
Dynamix
|
| T-111 |
American Laser Games
|
| T-112 |
Hi-Tech Expressions
|
| T-113 |
Psygnosis
|
| T-114 |
T&E Soft
|
| T-115 |
Core Design
|
| T-116 |
|
| T-117 |
|
| T-118 |
Compton's New Media
|
| T-119 |
Accolade
|
| T-120 |
Codemasters
|
| T-121 |
ReadySoft
|
| T-122 |
|
| T-123 |
Gremlin Interactive
|
| T-124 |
Spectrum Holobyte
|
| T-125 |
Interplay
|
| T-126 |
Maxis
|
| T-127 |
Working Designs
|
| T-128 |
|
| T-129 |
|
| T-130 |
Activision
|
| T-131 |
|
| T-132 |
Playmates
|
| T-133 |
Bandai
|
| T-134 |
|
| T-135 |
CapDisc
|
| T-136 |
|
| T-137 |
ASC Games
|
| T-138 |
|
| T-139 |
Viacom New Media
|
| T-140 |
|
| T-141 |
Toei Video
|
| T-142 |
|
| T-143 |
Hudson Soft
|
| T-144 |
Atlus
|
| T-145 |
Sony Music Entertainment
|
| T-146 |
Takara
|
| T-147 |
Sansan
|
| T-148 |
|
| T-149 |
Infocom
|
| T-150 |
Imagineer
|
| T-151 |
Infogrames
|
| T-152 |
Davidson & Associates
|
| T-153 |
Rocket Science Games
|
| T-154 |
Technos Japan
|
| T-155 |
|
| T-156 |
|
| T-157 |
Angel
|
| T-158 |
Mindscape
|
| T-159 |
Crystal Dynamics
|
| T-160 |
Sales Curve Interactive
|
| T-161 |
Fox Interactive
|
| T-162 |
Digital Pictures
|
| T-163 |
|
| T-164 |
Ocean
|
| T-165 |
Seta
|
| T-166 |
Altron
|
| T-167 |
ASK Kodansha
|
| T-168 |
Athena
|
| T-169 |
Gakken
|
| T-170 |
General Entertainment (GE)
|
| T-171 |
|
| T-172 |
|
| T-173 |
|
| T-174 |
Glams
|
| T-175 |
|
| T-176 |
ASCII Something Good
|
| T-177 |
Ubisoft
|
| T-178 |
Hitachi
|
| T-179 |
|
| T-180 |
BMG Japan
|
| T-181 |
Obunsha
|
| T-182 |
Thinking Cap
|
| T-183 |
|
| T-184 |
|
| T-185 |
Gaga Communications
|
| T-186 |
Game Bank/Soft Bank
|
| T-187 |
Naxat Soft > Pionesoft
|
| T-188 |
Mizuki > Maxbet > Spike, Geo
|
| T-189 |
KAZe
|
| T-190 |
|
| T-191 |
|
| T-192 |
|
| T-193 |
Diapet
|
| T-194 |
We Net
|
| T-195 |
Datam Polystar
|
| T-196 |
|
| T-197 |
KID (Kindle Imagine Develop)
|
| T-198 |
Epoch/Sakata SAS
|
| T-199 |
Ving
|
| T-200 |
Yoshimoto Kogyo
|
| T-201 |
NEC Interchannel/InterChannel
|
| T-202 |
Sonnet Computer Entertainment/Varie
|
| T-203 |
Game Studio
|
| T-204 |
Psikyo
|
| T-205 |
Media Entertainment
|
| T-206 |
Banpresto
|
| T-207 |
Ecseco Development
|
| T-208 |
Bullet Proof Software (BPS)/Elorg
|
| T-209 |
SIEG/PRISM
|
| T-210 |
Yanoman Games
|
| T-211 |
|
| T-212 |
Oz Club
|
| T-213 |
Nihon Create
|
| T-214 |
Media Rings
|
| T-215 |
Shoeisha
|
| T-216 |
OPeNBooK
|
| T-217 |
Hamlet/Hakuhodo
|
| T-218 |
Yumedia (Aroma)
|
| T-219 |
Societa Daikanyama
|
| T-220 |
Arc System Works
|
| T-221 |
Climax Entertainment
|
| T-222 |
Pioneer LDC
|
| T-223 |
Tokuma Shoten
|
| T-224 |
I'MAX
|
| T-225 |
|
| T-226 |
Shogakukan
|
| T-227 |
Vantan International/Electric Dreams/Nayuta
|
| T-228 |
|
| T-229 |
Titus
|
| T-230 |
LucasArts
|
| T-231 |
Pai
|
| T-232 |
Ecole > Reindeer
|
| T-233 |
|
| T-234 |
Bandai Visual
|
| T-235 |
Quintet
|
| T-236 |
|
| T-237 |
|
| T-238 |
|
| T-239 |
Disney Interactive
|
| T-240 |
9003 > OpenBook9003
|
| T-241 |
Multisoft/Millenium Interactive
|
| T-242 |
Sky Think System
|
| T-243 |
OCC
|
| T-244 |
|
| T-245 |
|
| T-246 |
INCREMENT P (iPC)
|
| T-247 |
|
| T-248 |
|
| T-249 |
King Records
|
| T-250 |
Fun House
|
| T-251 |
Patra
|
| T-252 |
Inner Brain
|
| T-253 |
Make Software
|
| T-254 |
GT Interactive Software
|
| T-255 |
Kodansha
|
| T-256 |
|
| T-257 |
Clef
|
| T-258 |
|
| T-259 |
C-Seven
|
| T-260 |
Fujitsu Parex/JAPAN MEDIA PROGRAMMING (JAMP)
|
| T-261 |
Xing Entertainment
|
| T-262 |
|
| T-263 |
|
| T-264 |
Media Quest
|
| T-265 |
|
| T-266 |
|
| T-267 |
|
| T-268 |
WOOYOUNG
|
| T-269 |
|
| T-270 |
Nihon System
|
| T-271 |
Virgin Interactive Entertainment, SCHOLAR
|
| T-272 |
|
| T-273 |
Datt Japan
|
| T-274 |
|
| T-275 |
|
| T-276 |
|
| T-277 |
|
| T-278 |
MediaWorks
|
| T-279 |
Kadokawa Shoten
|
| T-280 |
Elf
|
| T-281 |
|
| T-282 |
Tomy
|
| T-283 |
|
| T-284 |
|
| T-285 |
|
| T-286 |
|
| T-287 |
|
| T-288 |
|
| T-289 |
KSS/media muse, OPEN SESAME
|
| T-290 |
MYCOM (Mainichi Communications)
|
| T-291 |
Warashi
|
| T-292 |
Metro
|
| T-293 |
SAI-MATE
|
| T-294 |
Kokopeli Digital Studios
|
| T-295 |
|
| T-296 |
BMG Victor/Planning Office WADA (pow)
|
| T-297 |
Telstar
|
| T-298 |
|
| T-299 |
|
| T-300 |
WARP/Kumon Publishing
|
| T-301 |
|
| T-302 |
|
| T-303 |
Masudaya
|
| T-304 |
|
| T-305 |
|
| T-306 |
SoftOffice
|
| T-307 |
Empire Interactive
|
| T-308 |
Sada Soft (Genki)
|
| T-309 |
Neverland/ESP (used only for Senkutsu Katsuryuu Taisen Chaos Seed, and I can't find any other Never Land game for a Sega system so)
|
| T-310 |
Shar Rock
|
| T-311 |
Natsume
|
| T-312 |
NEXUS INTERACT/DaZZ, ISCO, Digital weare
|
| T-313 |
Aplix
|
| T-314 |
Omiya Soft
|
| T-315 |
JVC
|
| T-316 |
Zoom
|
| T-317 |
|
| T-318 |
|
| T-319 |
|
| T-320 |
|
| T-321 |
Ten
|
| T-322 |
FUJITSU/Digital weare
|
| T-323 |
|
| T-324 |
|
| T-325 |
TGL (TECHNICAL GROUP LABORATORY)
|
| T-326 |
RED/SIMS
|
| T-327 |
|
| T-328 |
Waka Manufacturing
|
| T-329 |
Treasure/ESP (appears to only have been used for the Sega Saturn releases of Silhouette Mirage and Radiant Silvergun, with Ikaruga and Bangai-O being given ESP numbers despite being Treasure/ESP)
|
| T-330 |
Tokuma Shoten Intermedia
|
| T-331 |
Camelot
|
| T-332 |
|
| T-333 |
|
| T-334 |
|
| T-335 |
|
| T-336 |
|
| T-337 |
|
| T-338 |
|
| T-339 |
Sting/ESP (appears to have only been used for Baroque, with a Sega/ESP/Sting Dreamcast game being given a ESP number)
|
| T-340 |
Chunsoft
|
| T-341 |
Aki
|
| T-342 |
From Software
|
| T-343 |
|
| T-344 |
|
| T-345 |
|
| T-346 |
Daiki
|
| T-347 |
|
| T-348 |
Aspect
|
| T-349 |
|
| T-350 |
MiCROViSion
|
| T-351 |
Gainax
|
| T-352 |
|
| T-353 |
|
| T-354 |
FortyFive (45XLV)
|
| T-355 |
Enix
|
| T-356 |
Ray
|
| T-357 |
TONKINHOUSE
|
| T-358 |
|
| T-359 |
|
| T-360 |
OUTRIGGER/Infini Entertainment Technology/Sierra
|
| T-361 |
Bandai Visual, B-factory
|
| T-362 |
Lay-up
|
| T-363 |
AXELA/BREAK
|
| T-364 |
WorkJam (DIGITAL TOKYO, PLANPLAN)
|
| T-365 |
Nsyscom > Syscom Entertainment
|
| T-366 |
|
| T-367 |
Full On Games
|
| T-368 |
Eidos
|
| T-369 |
UEP-System
|
| T-370 |
Shouei System > Xuse
|
| T-371 |
GMF/Falcom
|
| T-372 |
|
| T-373 |
ADK/SNK
|
| T-374 |
SOFTSTAR ENTERTAINMENT
|
| T-375 |
Nexton
|
| T-376 |
Denshi Media Services
|
| T-377 |
|
| T-378 |
|
| T-379 |
Takuyo
|
| T-380 |
Starlight Marry
|
| T-381 |
CRYSTAL VISION/Scoop
|
| T-382 |
Kamata and Partners
|
| T-383 |
AquaPlus
|
| T-384 |
Media Gallop
|
| T-385 |
Culture Brain
|
| T-386 |
LOCUS/SOLITON SOFTWARE
|
| T-387 |
Entertainment Software Publishing (ESP)
|
| T-388 |
NEC Home Electronics
|
| T-389 |
|
| T-390 |
Pulse Interactive
|
| T-391 |
Random House
|
| T-392 |
|
| T-393 |
|
| T-394 |
DigiToys/VIVARIUM
|
| T-395 |
Mebius
|
| T-396 |
Panther Software
|
| T-397 |
Hitachi Media Force
|
| T-398 |
NetVillage > Gamevillage/C's ware
|
| T-399 |
|
| T-400 |
Noisia
|
| T-401 |
Shangri-La
|
| T-402 |
Crave
|
| T-403 |
Metro3D
|
| T-404 |
Majesco
|
| T-405 |
Take 2 Interactive
|
| T-406 |
Hasbro Interactive
|
| T-407 |
Rage Software
|
| T-408 |
Marvelous Entertainment
|
| T-409 |
Bottom Up > Softmax
|
| T-410 |
Daikoku Denki/Falcon
|
| T-411 |
Sunrise Interactive
|
| T-412 |
Bimboosoft
|
| T-413 |
UFO
|
| T-414 |
Mattel Interactive
|
| T-415 |
Caramelpot
|
| T-416 |
Vatical
|
| T-417 |
Ripcord
|
| T-418 |
Sega Toys
|
| T-419 |
Gathering of Developers
|
| T-420 |
|
| T-421 |
Rockstar
|
| T-422 |
Winkysoft
|
| T-423 |
Cyber Front
|
| T-424 |
DaZZ/Nexus Interact
|
| T-425 |
|
| T-426 |
|
| T-427 |
|
| T-428 |
KOBI
|
| T-429 |
Fujicom
|
| T-430 |
|
| T-431 |
|
| T-432 |
|
| T-433 |
Real Vision
|
| T-434 |
Visit
|
| T-435 |
Global A Entertainment
|
| T-436 |
|
| T-437 |
|
| T-438 |
Studio Wonder Effect
|
| T-439 |
Media Factory
|
| T-440 |
|
| T-441 |
Red
|
| T-442 |
|
| T-443 |
Agetec
|
| T-444 |
Abel
|
| T-445 |
Softmax
|
| T-446 |
ISAO
|
| T-447 |
Kool Kizz Amusement Works
|
| T-448 |
GeneX/Ninelives
|
| T-449 |
Xicat Interactive
|
| T-450 |
Swing! Entertainment
|
| T-451 |
Yuke's
|
| T-452 |
|
| T-453 |
|
| T-454 |
AAA Game
|
| T-455 |
TV Asahi
|
| T-456 |
Crazy Games
|
| T-457 |
Atmark/Yuki Enterprise
|
| T-458 |
Hackberry
|
| T-459 |
|
| T-460 |
AIA
|
| T-461 |
Starfish
|
| T-462 |
Idea Factory
|
| T-463 |
Broccoli
|
| T-464 |
|
| T-465 |
Princess Soft
|
| T-466 |
Big Ben
|
| T-467 |
G.rev
|
| T-468 |
|
| T-469 |
Symbio Planning
|
| T-470 |
|
| T-471 |
Alchemist
|
| T-472 |
D3Publisher
|
| T-473 |
SNK Playmore
|
| T-474 |
D3Publisher
|
| T-475 |
"Chara, Rainsoftware/Milksoft"
|
| T-476 |
GN Software (Good Navigate)
|
| T-477 |
Alfa System
|
| T-478 |
Milestone Inc.
|
| T-479 |
Triangle Service
|
Publishers Whose Codes Are Unknown