Here is the full list of all 45 Backyard Sports: Sandlot Sluggers achievements worth 1,000 gamerscore.
Win in the final inning while things are looking down (5-inning game)
Successfully hit a Mirage Ball
Win every Story Mode game using the mercy rule
Defeat The Bullies in Story Mode
Jorge joins your team in Story Mode
Got all the gear in Story Mode
Sid & Ash join your team in Story Mode
Tony joins your team in Story Mode
Joey joins your team in Story Mode
Dmitri joins your team in Story Mode
Hit back to back out of the park home runs
Keisha joins your team in Story Mode
Score the winning run in the bottom of the final inning with two outs and two runners left on base
Win a game with a walk off home run
Hit a grand slam
Hit for the cycle with a single player
Get four or more hits with one player in a single game
Keep your opponent from scoring a run after leading off with a double or a triple
Strike out a batter using the Rocket Ball
Get three runners out in a single play
Get blowed up real good by a Ticking Time Ball
Pablo joins your team in Story Mode
Vicki joins your team in Story Mode
Hold your opponents to zero runs (5-inning game)
Change pitchers before the final inning and win the game
Congratulations on your first win!
Win a game without changing pitchers
Earn a win through the mercy rule
Strike out three batters in one inning
The whole team gets a swing during a single inning
Hit a home run off a Meteor Ball
Hit one out of the park
Hit for a triple
Get a single on a bunt attempt
Earn a double or better with the Fire Bat
Hit a home run with two strikes and zero balls
Get a walk while at bat
Steal home
Steal second and third base with the same player in the same inning
Hit an in-the-park homer
Congratulations on your first RBI!
Strike out a batter
Hit for a double
Freeze a fielder using The Icicle
Get two runners out in a single play