Hi mahdi.
to download all of the bk series, and download every game that you would like to have,
first, visit
audiogames.net
then, at the end of the website, there is a combo box. press c to get to that the combobox, pthen find the game that you want, after that, press tab to hear, go! button. then enter on that.
on the next page, there is a download link for the game, and you can download the game, if that link is not working, you can ask in the forum for the download link.
and about the games,
bk1, is not translated into english, it is completely in japanese.
bk2, is translated to english,
and bk3, is also translated in english, but you should buy the translation
there is a post about bk3 in gooshkon.ir, you can read it.
and direct download links:
bk1:
http://www.nyanchangames.com/softs/nn_setup.exe
bk2:
https://www.agarchive.net/games/nyancha … ken%202.7z
bk3:
https://www.agarchive.net/games/nyancha … ken%203.7z

If you had questions, email me at [email protected] and we can talk about it in farsi.

I really don't understand what you mean, but let me try and help. Bk1 is an RPG type of game where the game is played from above except for battles where they are played as a side-scroller. BK2 is a side-scroller, you have to fight ennemies and complete certain objectives. BK3 is also a side scroller but it includes a lot more such as the ability to climb, use ladders, etc. And to download those, simply do as you were told in another topic and search the list of games on audiogames.net

The translation is nearly complete, and updates are delivered automatically if you've bought it. It's through the original site of the developer which is in Japanese.