[Matrixbeast]

Unfortunately, the franchise that lives on a shoe string budget isn't exactly going to get a big budget game.
Most Power Ranger tie in games were either cheap side scroller beat 'em ups, or very poor attempts at action games. Also not helped is that most of these titles were released in the middle of their respective seasons, so you're not going to get the full story of the show.

From what I can remember, I think the Ninja Storm and Samurai games were okay compared to the others, but the vast majority are just not worth playing.

If you're willing to step outside of Power Rangers, the Jetman game is a half decent platformer (Though don't bother with the Zyuranger game).