To unlock Ken Shamrock:
Complete 7-8 years in Season mode

To unlock Vince McMahon:
Complete 10 years in Season mode

Unlock Mick Foley
Complete five years in Season mode.

Bonus Costumes
Steal from other wrestlers to unlock Bonus Costumes. If you steal twice you will get two Bonus Costumes.

Unlock Titantron Movies
To unlock the Titantron movie for a wrestler, steal from him/her three
times.

Unlock Extra Arenas

No Way Out Arena:
Win at No Way Out in Season mode

Royal Rumble Arena:
Win at Royal Rumble in Season mode

Summerslam Arena:
Win at Summerslam in Season mode

Survivor Series Arena:
Win at Survivor Series in Season mode

Armageddon Arena:
Win at Armageddon in Season mode

Backlash Arena:
Win at Backlash in Season mode

Judgment Day Arena:
Win at Judgment Day in Season mode

King of the Ring Arena:
Win at King of the Ring in Season mode

No Mercy Arena:
Win at No Mercy in Season mode

Unforgiven Arena:
Win at Unforgiven in Season mode

Vengeance Arena:
Win at Vengeance in Season mode

Wrestlemania XIX Arena:
Win at Wrestlemania in Season mode