Possible?
With USB mice pretty common nowadays, it would be likely a customer for a game has two of them. If the game is mouse controlled and has a two player mode in some form, why not include the feature to have them both use mice?
E.g. two player pong on one computer (coop or versus).
E.g. two player arkanoid on one computer (coop or versus).
Etc. you get the idea.
With USB mice pretty common nowadays, it would be likely a customer for a game has two of them. If the game is mouse controlled and has a two player mode in some form, why not include the feature to have them both use mice?
E.g. two player pong on one computer (coop or versus).
E.g. two player arkanoid on one computer (coop or versus).
Etc. you get the idea.