20 Heroes is a puzzle platformer with a unique twist, where players are assigned twenty characters to control separately, in a group, or all at the same time. Puzzles in every area are designed around this theme, and the creativity of the designer really shows after the fifth stage or so.

You can press the down arrow key to activate a character, who will then follow your orders until they succumb to a trap or a fatal injury caused by an enemy. The space key is used to select a menu option, and you can move heroes around the map or make them jump by using the cursor keys. Pressing G allows players to restart the game. Some enemies can be stomped on, while others can only be defeated in numbers or by using a certain strategy.

Note that the game isn't really designed to be played by audiences outside of Japan, as the quiz section in stage twelve is delivered in Japanese and near impossible to beat unless you are fluent in the language. (quiz cheat sheet)