Dreamcast Mouse

The mouse (HKT-9900) released in Japan, much like the keyboard, was much smaller than the one released elsewhere. It also comes in a cool skeleton/see-through case and is perfect for shooters like Quake 3 and Outtrigger.

Here is a complete list of games that support the mouse controller.

Chu Chu Rocket
Hidden and Dangerous
Phantasy Star Online
Quake 3
Rainbow Six Rogue Spear
Soldier of Fortune
Typing of the Dead
Unreal Tournament
Confidential Mission
Railroad Tycoon II
Silent Scope
Stupid Invaders
Worms Armageddon
Worms World Party