I, Robot
A lot of games now come with an option to play against an artifical oponent - often called an AI, or automa. Don't worry though, the AI won't try to take over the world and enslave humanity. Instead an automa is there to offer the option of an additional player. In fact, some games allow you to add multiple automa, if you so wish. Artificial oponents come in many flavours and often provide different levels of difficulty, allowing you to choose how tough you want your new opponent to be.