Unlock stuff:
To unlock...              ...you have to: 
Heavyweight Belt Tour     Win the Heavyweight Title 
TV Belt Tour              Win the TV Title 
Tag Team Belt Tour        Win the Tag Team Title 
Toughman Belt Tour        Win the two player career mode 
Big damage mode           Win the Toughman Belt Tournament on the hard 
                          with No Blocking on 
New custom stuff          Beat one player career mode on the hard 
                          with a Custom Wrestler 
New stable stuff          Beat stable career mode on the hard 
                          with any Stable, Featured, or Custom Wrestler 

Unlock characters:
To unlock...         ...you have to win the Heavyweight Belt Tournament 
on hard with: 
Joey Styles          The Sandman 
Joel Gertner         Mikey Whipwreck 
Lou E. Dangerously   "Beautiful" Billy Wiles 
Paul Heyman          Dusty Rhodes 
Cyrus The Virus      Rhino 
Jim Molineax         Rhino 
John Finegan         Angel 
Bill Alfonso         Tony Devito 
Judge Jeff Jones     Jack Victory 
William F.           Balls Mahoney 
Valkyrie             Jazz 
Shaman               Chris Chetti 
Esophicus            Yoshiro Tajiri 
Doug Gentry          Masato Tanaka 
Candy Girl           C.W. Anderson 
Booger               The Prodigy 
Helia Monster        Jason 
Gabe S.              Lance Storm 
Rob Feinstein        Danny Doring 
Martian Boy          Tommy Dreamer 
Mad Goat             Electra 
Jester               Francine 
Jan E. Regan         Little Guido 
Kid                  Steve Corino 
The D I              Justin Credible 
Sally M.             Dawn Marie 
Lance Storm          Trainer 


Unlock modes:
To unlock...       ...you have to win the Heavyweight Belt Tournament 
on hard with: 
Random head mode   Nova 
Big head mode      Simon Daimond 
Little head mode   Amish Roadkill 
Headless mode      New Jack 
Big hands mode     Super Crazy 
Big feet mode      "Little" Spike Dudley 
Fat man mode       "Big" Sal E. Graziano 
Hangman mode       Kid Kash 
Ego mode           Jerry Lynn