Here is an overview of the demo, via Square Enix:

Theatrhythm: Final Bar Line is the biggest rhythm action game in the series, with a massive 385 Final Fantasy tracks in the standard edition alone – plus 27 more in the Deluxe Editions. Plus, there will be multiple downloadable content packs featuring music from other Square Enix series, like NieR, Octopath Traveler, LIVE A LIVE, Mana, SaGa, and more.

That’s a lot of music, and the demo gives you a generous selection of 30 tracks from that massive playlist.

Music Stages in the game fall into three types:

• Battle Music Stage (BMS) – Defeat waves of enemies in time to up-tempo battle themes.
• Field Music Stage (FMS) – Journey forth with a party across themed landscapes with relaxing field music.
• Event Music Stage (EMS) – Play to the beat against the backdrop of unforgettable scenes from each title.

Here’s which tracks are included in the demo – and the type of stage you’ll play through:

• Final Fantasy II
  • “The Rebel Army” (BMS)
  • “Battle 1” (BMS)
  • “Town” (FMS)
  • “Main Theme” (FMS)
• Final Fantasy V
  • “Main Theme of Final Fantasy V” (BMS)
  • “Four Hearts” (FMS)
  • “Battle 1” (BMS)
  • “Battle 2” (BMS)
  • “Mambo de Chocobo” (FMS)
  • “Harvest” (FMS)
• Final Fantasy VII
  • “Opening – Bombing Mission” (BMS)
  • “Let the Battles Begin!” (BMS)
  • “Fight On!” (BMS)
  • “The Chase” (FMS)
  • “Main Theme of Final Fantasy VII” (FMS)
• Final Fantasy XIII
  • “Defiers of Fate” (BMS)
  • “Saber’s Edge” (BMS)
  • “Blinded by Light” (BMS)
  • “March of the Dreadnoughts” (FMS)
  • “Desperate Struggle” (BMS)
• Final Fantasy XIV
  • “Hard to Miss” (BMS)
  • “On Westerly Winds” (FMS)
  • “The Land Breathes” (BMS)
  • “Serenity” (FMS)
  • “Torn from the Heavens” (BMS)
  • “To the Sun” (FMS)
  • “Nemesis” (BMS)
• Final Fantasy XV
  • “Stand Your Ground” (BMS)
  • “The Fight Is On!” (BMS)
  • “APOCALYPSIS NOCTIS (Uncovered Trailer)” (BMS)

Theatrhythm: Final Bar Line is due out for PlayStation 4 and Switch on February 16 worldwide. Read more about the game here, here, here, here, and here.