This game does have any ideas that fighting games nowadays doesn't. This game must be revolutionary.
Takes like 2 or more hours to master in each HAR (or robot) AND if you search the FAQ in Google. The story mode (One Player Game) and the Tournament mode are good (specially the last one it's surprisingly addictive).
In Tournament Mode you can improve your HAR parts and your pilot skills (also to trade for another robot and colour it). These things makes this game even more original.
Gameplay is simple, in battle you can hit with only two buttons, simplified than any game nowadays. And activating the secret feature "re-hit mode", and using enhancements makes the game even more interesting, improving speed and adrenaline, so becomes addictive.
Music and sounds are exceptional, graphics quality by age is amazing (specially those drown faces), don't forget the scoreboard, and the first thing I said: There's a lot of surprises in-game!!!