Trigger-happy Dreamcast owners don't really have much to choose from in terms of game selection, with
House of the Dead 2 reigning as the only domestic shooter, and
Virtua Cop 2 &
Death Crimson 2 available from Japan. Regardless, if you're going to play a DC shooter, you've got to do it right. You'll need a lightgun to get the true experience out of these games, because, face it -- who wants to shoot zombies with a gamepad??
The Sniper Lightgun allows you to play the aforementioned Dreamcast games by 'shooting' at the TV screen (duh), with additional auto fire & auto reload settings to make things easier on your trigger finger. A mild vibration feature is built-in, and there's a slot for your VMU or external Jump Pack if desired.