I don't usually post frontpage updates about things like this, but I found something interesting on 505's Italian distributor site - "Wild Western" for the DS by Taito, seemingly a remake/sequel of their 1982 arcade game. The thing is, it hasn't been announced anywhere else, even in Japan. So I've got a bit of an exclusive here. Woo.
Translated from the Italian, vaguely:
Wolfy is a bounty hunter who has dedicated his life to justice. Now the moment of being able to capture the most dangerous outlaw in the West is at hand. In a wild world, using the stylus, the player must help Wolfy to complete the most dangerous missions.
Weird. I didn't get the instant unlock thing on Zombie Hunters either, but I just started it up for the second time and there it is.