NHL 2003 is the eleventh edition of the popular EA Sports NHL series, a hockey video game. NHL 2003 introduced a new feature, the GameBreaker. It is activated once a player performs enough "dekes" and it is used to help change the momentum of the game, such as scoring a big goal, delivering a big hit or winning a big fight. The commentary in NHL 2003 is voiced by Jim Hughson and Don Taylor. Hughson has been the NHL series announcer since NHL '97, while Taylor first appeared in the previous year's version.
(Wikipedia)

Unlockables

Unlocking Players
To unlock a player just follow specific method

Adam Hall - Go to Create a Player and enter Adam Hall

Alfie Michaud - Go to Create a Player and enter Alfie Michaud

Barry Richter - Go to Create a Player and enter Barry Richter

Ben Simon - Go to Create a Player and enter Ben Simon

Blake Bellefeuille - Go to Create a Player and enter Blake Bellefeuille

Brad Moran - Go to Create a Player and enter Brad Moran

Brian Sutherby - Go to Create a Player and enter Brian Sutherby

Chris Ferraro - Go to Create a Player and enter Chris Ferraro

Corey Hirsch - Go to Create a Player and enter Corey Hirsch

Dave Morisset - Go to Create a Player and enter Dave Morisset

David Nemirovsky - Go to Create a Player and enter David Nemirovsky

Derek Mackenzie - Go to Create a Player and enter Derek Mackenzie

Erin Fichaud - Go to Create a Player and enter Erin Fichaud

Evgeny Konstantinov - Go to Create a Player and enter Evgeny Konstantinov

Greg Crozier - Go to Create a Player and enter Greg Crozier

Greg Pankewicz - Go to Create a Player and enter Greg Pankewicz

Guy Hebert - Go to Create a Player and enter Guy Hebert

Ivan Huml - Go to Create a Player and enter Ivan Huml

Jakub Cutta - Go to Create a Player and enter Jakub Cutta

Jason LaBarbera - Go to Create a Player and enter Jason LaBarbera

Jason Zent - Go to Create a Player and enter Jason Zent

Johan Witehall - Go to Create a Player and enter Johan Witehall

Kay Whitmore - Go to Create a Player and enter Kay Whitmore

Larry Murphy - Go to Create a Player and enter Larry Murphy

Mark Fitzpatrick - Go to Create a Player and enter Mark Fitzpatrick

Marquis Mathieu - Go to Create a Player and enter Marquis Mathieu

Martin Brochu - Go to Create a Player and enter Martin Brochu

Matt Herr - Go to Create a Player and enter Matt Herr

Matt Higgins - Go to Create a Player and enter Matt Higgins

Michel Larocque - Go to Create a Player and enter Michel Larocque

Raffi Torres - Go to Create a Player and enter Raffi Torres

Rene Corbet - Go to Create a Player and enter Rene Corbet

Rich Parent - Go to Create a Player and enter Rich Parent

Rick Tabaracci - Go to Create a Player and enter Rick Tabaracci

Sascha Goc - Go to Create a Player and enter Sascha Goc

Scott Fankhouser - Go to Create a Player and enter Scott Fankhouser

Ty Jones - Go to Create a Player and enter Ty Jones as the name

Xavier Delisle - Go to Create a Player and enter Xavier Delisle as the name

Secrets

Get any player you want without trading!!!!
You can get any player on your team that you want. For example in Franchise you were the Ottawa Senators and you wanted Mats Sundin on your team then you would - Go to Create a Player and then when it asks to put in a first and last name you would type in the name of the player you want ex. Mats Sundin and then it will say that player is already in the database and do you want to make a player like him. Say yeas and every thing from date of birth to what he looks like and his attributes will be the same as that player.

See how the game's played on the Xbox: