Game series starting with T:

Tales Of Monkey Island
Tarzan
Tekken
Temple Of Apshai
Tenchu
Test Drive
Text Twist
The Chronicles Of Riddick
The Elder Scrolls
The Game Of Life
The Hardy Boys
The Hidden Object Show
The Incredible Machine
The Last Ninja
The Lion King
The Lord Of The Rings Online
The Lost Cases Of Sherlock Holmes
The Magic School Bus
The Magician's Handbook
The Mummy
The Pawn
The Shadow Of Yserbius
The Sims
The Sims Online
The Witcher
Theme Park
thinkSMART
Thrillville
Tiger Woods PGA Tour
Tomb Raider
Tony Hawk
Tony Hawk's Underground
Top Spin
Touchmaster
Trailblazer
Transformers
Travelogue 360
Treasure Seekers
True Crime
Turok
TV Sports
Two Worlds
Ty The Tasmanian Tiger