Metal Max is essentially a Mad Max role playing game with vehicle combat. The series takes place in a post apocalyptic world with an open ended gameplay and combat dogs before Call of Duty Ghost made them a meme.
Famitsu announced Metal Max 4: Moonlight Diva for Nintendo 3DS. The game will be released in Japan this fall and will have downloadable content. Kadokawa Games which started publishing Metal Max games with Metal Max 3 will handle Metal Max 4.
None of the main Metal Max games have been localized so we’ve missed out on customizing tanks and fighting sentient bulldozers. However, Atlus localized Metal Saga which was a spiritual successor from Success Corporation.