Harmonix Music Systems, Inc. is the developer and publisher of Amplitude, a rhythm-action video game created for PlayStation 4. The company presents the game as a reimagined take on its earlier music experiences, combining track-based play, fast-paced challenges, and a soundtrack featuring artists and music from Harmonix and other contributors.

Amplitude offers a story mode and multiplayer gameplay for up to four players, with competitive free-for-all and cooperative team modes. Players navigate musical tracks, build their scores, and use six power-ups to boost performance, clear difficult sections, or disrupt opponents. The game also includes Freq Mode, an unlockable mode inspired by Frequency, three redesigned high-definition environments, a global leaderboard, and a PlayStation Platinum Trophy to earn.

The website provides a game trailer, feature information, soundtrack listings, development updates for Kickstarter supporters, and customer support resources. Amplitude is listed for purchase at $19.99. Harmonix Music Systems, Inc. is identified as both developer and publisher, while the game and related names and logos are presented as trademarks of their respective owners.