this game been playing it for 5yrs and they make update and newer virsion on this game for free. each year a new virsion come out and it free updates/upgrades.
unlike other games after a year or 2yrs there no more update for it will no so with this game there always a new updates/upgrades to it.
they even add new game type to play in it and online play too. have 1 on 1 match with others. i play in mostly offline but it really sweet to play.
checkout the free demo
Link:
http://kyodai.com/index.en.html
more info on the games type it has in it:
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