In 1990, Bandai also released a version of the game for the Game Boy which was developed by Realtime Associates. The game's introduction shows that Big Boy has escaped from the state penitentiary and kidnapped Tess, Tracy's love interest. The game play itself is purely level-based platforming, foregoing the overhead driving sequences of its NES counterpart. Both games share the same cover art.
Stylistically, the Game Boy version bears a strong resemblance to the side-scrolling mode of the NES version. Dick Tracy can punch and use the same weapons (hand gun, tommy gun, tear gas) as well as grenades (which will instantly kill all non-boss enemies on the screen). This game also shares some common music the NES version. Each of the five levels contains twelve hidden pieces of a photograph, used to solve a puzzle at the end of each level.
At the end of each level, Dick Tracy would fight one of the antagonists from the film (including Shoulders, Flattop, Pruneface). After defeating the boss, the player would need to solve the twelve-piece puzzle using the pieces found throughout the level to reveal a photo of the next boss to be pursued. If the puzzle could be solved within the allotted period of time, the player would be awarded a bonus life. For every two pieces placed correctly, the player would be awarded with one extra hit point. If any of the missing pieces were missed or if the puzzle isn't solved in time, then the game will automatically piece the whole image together (without any bonuses, of course). Then, Tracy would interrogate the fallen boss for where to search next for clues leading to Big Boy and Tess.
Source: Wikipedia, "Dick Tracy (Game Boy)", available under the CC-BY-SA License.