It's the later
http://myanimelist.net/manga/16844/Sengoku_Rance . I also found a translation for chapter 1...and 7 but not for 2,3 and so on
Theres also a Rance Ova, but its quite old
http://myanimelist.net/anime/5259/Rance:_Sabaku_no_Guardian . I haven't found any downloads for it till now
Edit:
Alicesoft has opened the offical website of Rance 8 (aka Rance Quest).
http://www.alicesoft.com/rance8/
You need to use a japanese proxy in order to view it.
Here are also two screenshots of Rance Quest
And heres the translation of the plot summary ( found on /jp)
As Rance traveled to JAPAN to snatch the famous beauty Kou-hime, he was given reign of power by Oda Nobunaga in the small nation of Obari.
He set out to conquer all of JAPAN and its beauties.
On his road to conquest, Rance defeated formidable foes such as Uesugi, Takeda, Imagawa, and finally conquers JAPAN.... but he loses the most trusted partner of his towards the end of the war.
Now....
Rance returns to the main continent, and visits the Kopa-Empire.
He brought with him a girl name Sachiko, whom he resuced on a whim (mostly for sex), and is living a life of adventure seeking quests for beautiful women and treasure!
Rance "Sill? Gahahahaha!!! I'll take care of that later!!"
Rance fucks women around as usual.
But when he visits a Kalar village for sex..... He's cursed with a curse that prevents him from having sex with girls!!
With his Hyper Weapon sealed.... what will happen to Rance!?
But wait, he can still have sex with strong girls!?
Rance's adventure for seeking "strong" beautiful women and treasure begins!
Lol that so sounds like a typical Rance game XD but... what about Sill v_v?