Incredivolley 

Incredivolley is a nice volleyball game in which you can play in multiple courts. The game can be played against the computer or against a human opponent locally. You can play using the keyboard or joystick, and the keys can be completely customized from the Settings menu. You can play a Quick game, in which you select the teams, but not the difficulty level. If you wish to play a bit more professionally, you can select an event, which can be a Tournament, Championship and Finals. I recommend that you first learn how to play in the Training mode, which explains everything step by step.

The game also comes with an editor which allows you to create your own courts and games. Regarding graphics, you can choose the resolution and other options before you start the game in order to adapt it to your computer requirements. In general, they are simple but attractive, with lots of colors. Sounds are nice and there is music only in a few parts, but not in the main menu or while you play.

To conclude, if you are looking for a nice volleyball game to play with a friend or alone, Incredivolley may work for you.