It really depends on what the score you set... the most common for casual games is 21. The score set for professional games can be over 100.
21
In a normal volleyball game you have to score to 25 and be winning be at least 2 points.
1
25 :D
about 2 points I think you can score more though . :D i heart volleyball
2
the volleyball game is over at 21 points. However no team can win by only one point. This makes longer games take more points to win. You need to be two points ahead.
25
21 points
12 scource.
25
10