If you are playing on the PlayStation 3 or Xbox 360, you are out of luck for offline multiplayer. The console versions never included a bot mode, and modding is not practically possible. Your only offline option on console is the single-player campaign.
Before diving into the solutions, we must clarify a common misunderstanding. Many gamers confuse Battlefield: Bad Company 2's "Onslaught Mode" with offline multiplayer. battlefield bad company 2 offline multiplayer
So, if you want to fly a Blackhawk helicopter on Heavy Metal while shooting AI enemies in a T-90 tank with no Wi-Fi, you cannot do it with the vanilla game. If you are playing on the PlayStation 3
Modders created a local server emulator. This piece of software tricks your game client into thinking it is connecting to an EA server, but instead, it routes the traffic to your own computer (localhost: 127.0.0.1). So, if you want to fly a Blackhawk