Ninja mangas!

[Ria]

Apart from Naruto. I'm looking for serious'ish mangas that are like the Tenchu games. Pity there isn't a Tenchu manga around.

[Teh EkwEE]

There is Samurai Killer Deeper. Or it's something very close to that.

[Kisanzi]

There is Samurai Killer Deeper. Or it's something very close to that.

Ummmm...do you mean Samurai Deeper Kyo perhaps???

Besides Naruto, you might want to look into Flame of Recca. It's a modern day ninja manga with some good characters and ninja action. The plot is interesting in the fact that the main character is a high school student with a cloudy past that grows up with his own unique ninja powers. And once he meets up with another girl with powers, he begins getting approached by opposing ninja clans that have hunted him down to kill him for reasons that remain unveiled in his past.

Other than that, Peace Maker Kurogane is also pretty good, it's story is very simular to Kenshin but from the Shinsengumi's point of view. It has a very good plot and personalities but it's mostly about samurai, with some ninjas on the side.

That's all I can think of off the top of my head, but I let you know if anymore come to mind.

[Teh EkwEE]

Samurai Deeper Kyo, yesh that's it. Is it good? I saw it and was very tempted to get it. I got Ragnarok instead though.

[Kisanzi]

It is indeed a good manga and it also has a great anime, that I'm currently in the process of watching. It's a nice mix of cool samurai action, classic Japanese historical-fiction and a little tongue-in-cheek comedy. But overall, a good manga.

But Ragnarok still owns! Still one of my faves!