Multi-player mode: Choose any scenario and character as usual. Begin the scenario then press L1 + L2 + R1 + R2 + Select during your turn. Choose the "Add Player Officer" on the menu that appears. All playable characters in the current scenario will appear. Choose a character for player two, then repeat to use up to eight controllable characters.

Secret characters: At the main menu choose "New Officer", then "Create New Officer". Choose the name option and enter one of the names below. For example, for Sun Tzu, enter Sun as the last name and Tzu as the first name, so the name appears as Sun Tzu. A musical note will play, and an officer will automatically be created and given type, ability, skills, and gender. Choose a birthdate, and face and everything else is done.

Abe Lincoln
Albert Einstein
Augustus Caesar
Ben Franklin
Benedict Arnold
Betsy Ross
Charles Darwin
Crazy Horse
Daniel Boone
Dynasty Warrior
Genghis Khan
George Patton (Note: Put an extra space after "George".)
Gitaroo Man
Harry Houdini
Jeanne Darc
Julius Caesar
Lady Diana
Mahatma Gandhi
Mark Antony
Mother Teresa
Nikola Tesla
Norma Jean
Robert Lee
Robin Hood
Sitting Bull
Sun Tzu
Thomas Paine
U 1
Ulysses Grant
Wyatt Earp