Little League World Series Baseball 2010
43 Achievements
PS3
Grand Slam
Successfully hit a base-loaded home run in a tournament game.
38.4%
How to unlock the Grand Slam achievement in Little League World Series Baseball 2010 - Definitive Guide
This has to be done in a Little League World Series tournament game. To set this up, you will need runners on 1st, 2nd, and 3rd base. Then with your star player (use your star player as he should be more capable of hitting home runs) hit a home run. You should try to make sure your talent is at level 3 to ensure you are able to hit a grand slam.