| Title | Games |
 | TBA
Location Unknown | 20 |
| Tactical Development
Location Unknown | 0 |
| Taito Corporation
Location Unknown | 8 |
| Takuyo Kougyo Co.
Location Unknown | 0 |
| Taldren
Costa Mesa, CA | 0 |
| Tannhauser Gate
Wroclaw, Poland | 0 |
| Tantalus
Australia | 0 |
| To Be Announced
Location Unknown | 3 |
| TDK Mediactive
Worldwide | 0 |
| Team 17
Location Unknown | 4 |
| Team Ninja
Location Unknown | 5 |
| Team Tarsier
Karlshamn, Sweden | 2 |
| Tecmo, Ltd.
Torrance, CA | 2 |
| Teleplan Development Studio
Location Unknown | 0 |
| Terminal Reality
Location Unknown | 2 |
| The Behemoth
San Diego, California | 2 |
| The Collective
Laguna Beach, CA | 3 |
| The Creative Assembly
Sussex, UK | 0 |
| THQ
California, USA | 9 |
| Tiburon Entertainment
Maitland, Florida | 2 |
| Titus Interactive
Location Unknown | 0 |
| Tiwak
Location Unknown | 0 |
| TOPHEAVY Studios
Location Unknown | 0 |
| Totally Games
Location Unknown | 0 |
| Touchdown Entertainment
Location Unknown | 0 |
| Toys for Bob
Novato, CA | 0 |
| Tranji
Location Unknown | 0 |
| Traveller's Tales
Location Unknown | 6 |
| Treyarch
Santa Monica, California | 5 |
| Treyarch/Gray Matter Studios
Location Unknown | 0 |
| TriLunar
Laguna Hills, CA | 0 |
| Twilyt Productions
Location Unknown | 0 |
| TT Games
Location Unknown | 1 |
| Techland
Location Unknown | 4 |
| Torpex Games
Bellevue, Washington | 1 |
| Third Wave Games
Location Unknown | 1 |
| Third Wave Games
Location Unknown | 1 |
| TopWare Interactive
Las Vegas, Nevada | 0 |
| Treasure Co Ltd
Location Unknown | 1 |
| Tetris Online Inc.
Location Unknown | 1 |
| Telltale Games
Location Unknown | 9 |
| TT Games
Location Unknown | 1 |
| Turtle Rock
Location Unknown | 0 |
| TimeGate Studios
Location Unknown | 2 |
| Tragnarion Studios
Location Unknown | 1 |
| Tomy
Location Unknown | 1 |
| Transmission Games
Location Unknown | 2 |
| Tozai Games
Location Unknown | 1 |
| The Bitmap Brothers
UK | 1 |
| TikGames
Location Unknown | 3 |
| Triumph Studios
Location Unknown | 2 |
| Tri-Crescendo
Location Unknown | 1 |
| Torus Games
Location Unknown | 1 |
| Tiger Hill
Location Unknown | 1 |
| Tamsoft
Location Unknown | 1 |
| Track 7
Location Unknown | 1 |
| Tigon
Location Unknown | 1 |
| Tri-Ace
Location Unknown | 2 |
| Twisted Pixel
Location Unknown | 2 |
| tAiRoN
Location Unknown | 1 |
| TooShort4 Games
Location Unknown | 1 |
| Takara Tomy
Location Unknown | 0 |
| TnTGaming
Location Unknown | 1 |
| Turn 10
Location Unknown | 0 |
| TBD
Location Unknown | 1 |
| Timeline Interactive
Location Unknown | 1 |
| Take-Two Interactive
Location Unknown | 1 |
| Tri-Ace
Location Unknown | 1 |
|
Live Chat: 10 |
Guests: 1984 |
Bungie's popular first-person shooter makes its debut on the Xbox 360 with Halo 3.
