From Foo Brew:
JamLegend has the ability to play on most computers that have internet access. The only requirement is to have the Adobe Flash plug-in installed. JamLegend features mutiple styles of gameplay: Guitar tap and Guitar strum. The only difference is that Guitar strum requires the player to strum the note and that Guitar Tap does not need strumming. Single- and multi-playing: There are three modes: Solo (against a bot, Roxanne or Chrys), Duels (player against player), and Showdowns (real-time multiplayer). Four difficulties for playing the songs: Normal, Skilled, Insane, and Legendary. In normal mode, only three notes are to be played, then four in skilled, and five for insane and legendary. Achievements system: The players have 48 possible goals to reach. Upload and play your own songs. Players upload an mp3 and a track they create for the song to make a playable track on JamLegend. The website allows artists to put their own music on the platform in order to be played.