singing games on video game formats pit multiple players against each other, or a single player against previous performances or a set standard. objectives might include subjectively rated creativity, adherence to a theme, ability to mimic another performer, or objectively rated pitch and note duration. examples include "karaoke revolution", released by konami, which measures a player's pitch and gives a score based on the player's ability to maintain the proper pitch and duration for each note while singing along with a song whose lyrics are displayed on the screen. high scores are saved, so players can compete against each other or previous scores.