What type of game do you call this?

What type of games you call where you can walk and drive around in an open-world game an have guns kill people have missions like Saints row And Gta? And are there in open-world iPhone games?

You can call it an "open world game", or an RPG depending on the game.

Sandbox/Free-roam is the style of genre.
Mobile GTA's (the III and Vice City) are already on the App Store.

That would be an. Open world type sort of thing, It's sort of like roleplaying but action combined, but it's mostly action so… Yeah. I would say action games, but yeah roleplaying as well… There are not many open world games… In the ipod or iphone but there's you know Grand theft auto vice city on iphone and ipod but it cost money (6 bucks) and grand theft auto Chinatown wars on ipod and iphone as well… (money as well)… There are not so many Open world games.so… I don't know about that.

Yea, what Instinct said. Its sandbox type game.