NBA 2K8 BOOSTING 

These can be easily completed with a friend. They do not have to be won consecutively. What you can do is play and have someone quit 19 times but on the 20th game, you have to play the full game. After the game, the six achievements will pop.

MULTIPLAYER ACHIEVEMENTS

Online Ranked Game - 15 points

Win one online ranked game.

3 Online Ranked Streak - 15 points

Win 3 online ranked games in a row.

5 Online Ranked Streak - 20 points

Win 5 online ranked games in a row.

5 Online Ranked Wins - 15 points

Win 5 online ranked games.

10 Online Ranked Wins - 25 points

Win 10 online ranked games.

20 Online Ranked Wins - 35 points

Win 20 online ranked games.