Mob games aren’t really fun unless you can disrespect your foes. That’s the idea behind iMob 2, the latest mobile social game from startup Addmired, which has had a string of hits.

The new iOS game (iPhone, iPod Touch, iPad) has a new feature in real-time online chat, where users can talk with other players and strategize attacks into the mob-themed game.

Palo Alto, Calif.-based Addmired has more than 37 million downloads of its games, including the original iMob role-playing game, dubbed a social massively multiplayer online game on mobile. The game has new storylines, expanded communities, and player vs player action. Yes, you got that right. One of the most popular mob games on mobile was created in crime-ridden Palo Alto, home of Stanford University.

The online chat system is built to handle messaging activity of tens of millions of players across several billion friendships within games, instantaneously and reliably. Players vie to be the top boss and earn prestige points in the game by destroying enemies.

Players also can play several mini-games within the chat system, which works via 3G or WiFi. They can also share YouTube videos with their friends while remaining in the game.

“The community drives the experience and engagement in our games,” said chief executive Gabriel Leydon. “With iMob 2, we focused on the right balance between gameplay and a vibrant in-game community that highly engages players over very long periods of time.”

The original iMob launched in January 2009 and within first 36 weeks had more than 6.5 million downloads during the early days of iOS platform. the game still has several hundred thousand monthly active players.

The free-to-play iMob 2 works on iOS 3.0 or later. Addmired launched in 2008 with funds from the Y-Combinator incubator. The company has seen explosive growth — more than 100 percent a year in revenue growth — for games such as iMob, Original Gangstaz, Global War, and others. It has more than 60 employees and is hiring. Rivals include Zynga, Playdom, and Red Robot Labs.