According to an update posted on Steam, Koei Tecmo has decided to delay the PC version of Dead or Alive 5: Last Round to March. They considered that a delay was necessary in order to give you the best experience.
However, the PlayStation 3, PlayStation 4, Xbox 360 and Xbox One versions of the game are still settled to release on February 17. Dead or Alive 5: Last Round is priced at $39.99 on current-gen and $29.99 on last-gen consoles.
Also, for those who intend to buy the game on PC via Steam, Koei Tecmo will offer you the Halloween 2013 Set, which contains 28 costumes, for no extra charge, as a gift for the delay.