In the Arcade you can play some games when you're bored, or need to wait your time out in jail for the next couple of minutes.
On the arcade page you can play various games like: Snake, Asteroids, Tetris, Space Invaders, Pacman, Home run, Pooljam, Curveball, Athlete.
This is just for fun, and has nothing to do with Omerta, it is a different company who controls it, so you won’t gain anything from it.
High scores don't get saved!