Feedback Sweepstakes (ended 6/30/2008)
Sarah T. – Sony 40GB PS3 and Nintendo Wii System

Are You A Ninja Sweepstakes (ended 5/29/2008)
Betty S. – Xbox 360 Gaming Console and Ninja Gaiden 2 video game
Cary C. – Xbox 360 Gaming Console and Ninja Gaiden 2 video game
Darrell B. – Xbox 360 Gaming Console and Ninja Gaiden 2 video game
Fred B. – Xbox 360 Gaming Console and Ninja Gaiden 2 video game
Lisa W. – Xbox 360 Gaming Console and Ninja Gaiden 2 video game

Feedback Sweepstakes (ended 5/31/2008)
Dylan C. – Sony 40GB PS3 and Nintendo Wii System

Feedback Sweepstakes (ended 4/30/2008)
Bill W. – Sony 40GB PS3 and Nintendo Wii System

Feedback Sweepstakes (ended 3/31/2008)
Naomi E. – Sony 40GB PS3 and Nintendo Wii System

Feedback Sweepstakes (ended 2/29/2008)
Elizabeth N. – Sony 40GB PS3 and Nintendo Wii System

Wrestlemania 24 Fan Axxess Sweepstakes (ended 2/25/2008)
Stephen B. – Trip to Orlando, Fl & tickets to Wrestlemania 24

Mii Sweepstakes (ended 1/31/2008)
Eddie T.– Wii Gaming Console with three Wii controllers & 2,000 Wii Points Card

Feedback Sweepstakes (ended 1/31/2008)
Brian L. – Sony 40GB PS3 and Nintendo Wii System

Feedback Sweepstakes (ended 12/31/2007)
Matt P. – Sony 40GB PS3 and Nintendo Wii System

Note: This list represents winners from the previous six months only.

 

I hope you are the Betty S., but I'm sorry I can't answer your question. I found the expired sweeps, and clicked on the links for both the sweeps and the rules, but neither one has information posted anymore.

Gamestop.Com - Are You A Ninja Sweepstakes
Grand Prize: One (1) Exclusive Ninja Gaiden 2 Branded Xbox 360 Elite Gaming System, approximate retail value (ARV) $449.99 and one (1) copy of Ninja Gaiden 2 video game for Xbox 360, ARV: $59.99. Total ARV of Grand Prize Package is $509.98. Runner-Up Prize: One (1) copy of Ninja Gaiden 2 video game for Xbox 360, ARV: $59.99, one (1) set of rubber ninja stars, ARV: $5.98, one (1) set of rubber double ninja swords, ARV: $9.95 and one (1) ninja uniform, ARV: $39.99. Total ARV of Runner-up Prize Package: $115.91
Restrictions : US, DC (age of majority) | Hits : 730 | Added : 04-28-08 | Expired : 05-29-2008 | Rules

Entry Category : One Entry

or

EB Games.Com - Are You A Ninja Sweepstakes
Grand Prize: One (1) Exclusive Ninja Gaiden 2 Branded Xbox 360 Elite Gaming System, approximate retail value (ARV) $449.99 and one (1) copy of Ninja Gaiden 2 video game for Xbox 360, ARV: $59.99. Total ARV of Grand Prize Package is $509.98. Runner-Up Prize: One (1) copy of Ninja Gaiden 2 video game for Xbox 360, ARV: $59.99, one (1) set of rubber ninja stars, ARV: $5.98, one (1) set of rubber double ninja swords, ARV: $9.95 and one (1) ninja uniform, ARV: $39.99. Total ARV of Runner-up Prize Package: $115.91
Restrictions : US, DC (age of majority) | Hits : 774 | Added : 04-28-08 | Expired : 05-29-2008 | Rules

Entry Category : One Entry

I guess you can be extra careful if you get an email from Game Stop or EB Games, or contacted somehow, or maybe you will just receive the prize, if you won. Did you enter the sweep? It was a one entry. Who knows how many Betty S's there are?? Hope you are the one.

I also looked at the rules for the two current sweeps listed here, but they may be different, so you may want to take a look, knowing that it may or may not be helpful. Also, the winner's list lists 5 winners, which doesn't quite match the info above, so there must be some missing pieces.

Maybe there is someone here who previously won from them and remembers how it worked.