Only Steve McQueen's likeness was used of all the characters who were in the film.
This game (which has 18 levels) adds more backstory for the characters of "Hilts" (played in the film by Steve McQueen), "Sedgewick" (played in the film by James Coburn), "MacDonald" (played in the film by Gordon Jackson) and "Henley" (played in the film by James Garner). It depicts any of their captures, times in other camps, or what they did after they escaped.
The character of "Ives" (played in the film by Angus Lennie) is one of the few characters never mentioned nor seen in any levels or animated cutscenes throughout the game.
Several animated cut scenes in the game are based off scenes in the 1963 film.