You can also play against the computer in Hero Rumble League. The computer has no AI for hero picking. However, you can generate a random hero for the computer player by typing -airandom as a chat message. In the actual match, the computer player's hero will try to attck almost always. You can put down your opponent using your strategy and tactics. At the start-up screen, if you want to play against the computer, you can choose the AI difficulty. There are stat changes with each AI difficulty. These changes are:
- Easy - Agility and Strength are decreased by 2 each
- Normal - No stat changes
- Insane - Agility and Strength are increased by 2 each