Home run sounds:

Press A (air horns), D (whistles), S, or W while running around the bases after hitting a home run.

Note: Set the Sound FX volume to maximum for best results.

Large Players Mode:

Simply hit a homerun with a player over 250 lbs. This is usually Babe Ruth or a Hefty Created Player.

Babe Ruth:

To unlock Babe Ruth and make him available in the Free Agent Pool. You must hit a home run with the PITCHER. It can be a created pitcher too....so just create one that has the ability to hit homeruns.

Island Stadium:

To reveal a secret stadium called "Island Stadium" usable in Exhibition Mode simply score 3 or more runs at the Giants New PAC BELL PARK.

Cy Young:

To release Cy Young and make him available for the Free Agent Market.You must throw 5 innings or more of shutout ball (can't let the other team score basically) or WIN 25+ games with the SAME pitcher in Season Mode.

Strike out the batter:

Note: This code requires the Gravis Gamepad Pro controller.

Hold L1 + L2 + R1 + R2 and press Up or Down. Then, press Blue, Red, Blue, Green, Yellow, Red. Throw a pitch to the outside, where the batter cannot it
the ball. If done correctly, you will get a strike out.

Hit a homerun:

Note: This code requires the Gravis Gamepad Pro controller.

Hold L1 + L2 + R1 + R2, press Blue, Red, Blue, Green, Yellow, Red, then press Left or Right.

Hints:

Once you unlock the "giant ball" cheat, the game becomes much easier. Vary your pitches and paint those corners to find the boundaries of the strike zone; the computer isn't good at picking up patterns. Don't forget to change pitchers when fatigue becomes a factor. If you don't, the AI will knock a few out of the park to remind you.

Space stadium:

Hit a ground rule double in season mode. Alternately, hit two inside the park homeruns in a season.

Satchel Paige:

Throw three consecutive strike outs or in a single game in season mode to unlock Satchel Paige as a free agent. Alternately, throw one hundred and fifty strike outs in a season.

Cy Young and Satchel Paige:

Throw a shut out in season mode and both will be a free agents.

Note: You have to throw two shutouts to get both of them.

Eddie Matthews:

Get a triple play in season mode to unlock Eddie Matthews as a free agent. Alternately, win the home run title with player with the Milwaukee Brewers.

Eddie Murray:

Hit a homerun while batting left-handed and right-handed with a switch hitting batter in a single game in season mode to unlock Eddie Murray as a free agent.

Ernie Banks:

Get six double plays in one game in season mode to unlock Ernie Banks as a free agent.

Frank Robinson:

Leadoff a game with back-to-back homeruns to unlock Frank Robinson as a free agent. Alternately, win the National League triple crown.

Hank Aaron:

Hit four consecutive homeruns or four total homeruns in a single game in season mode to unlock Hank Aaron as a free agent.

Harmon Killebrew:

Hit three homeruns over 500 feet in season mode to unlock Harmon Killebrew as a free agent. Alternately, get a triple play and two double plays in single game mode or season mode.

Jackie Robinson:

Steal second base and third base with the same player in a single game in season mode to unlock Jackie Robinson as a free agent. Alternately, steal home in a post-season game.

Jimmie Foxx:

Hit a ground rule double in season mode to unlock Jimmie Foxx as a free agent. Alternately, hit the foul pole while batting or get 8 RBIs by one player in a game.

Lou Gehrig:

Hit a single, double, triple, and homerun in a single game in season mode to unlock Lou Gehrig as a free agent.

Mel Ott:

Hit a home-run with a player that is shorter than 5'7" to unlock Mel Ott as a free agent. Alternately, hit a grand slam during the World Series.

Mickey Mantel:

Hit a homerun that travels over 575 feet in season mode to unlock Mickey Mantel as a free agent. Alternately, win the Triple Crown with any American League player. The easiest way to get Mantle is to play a single game in Space Stadium. The low gravity park almost guarantees at least one 575+ ft. homerun.

Mike Schmidt:

Hit two in-the-park homeruns in a single game in season mode to unlock Mike Schmidt as a free agent. Alternately, hit four home runs with the same player in a single game.

Reggie Jackson:

Hit an in-the-park homerun in season mode to unlock Reggie Jackson as a free agent. Alternately, hit ten home runs with a team.

Ted Williams:

Get three double plays in a single game in season mode to unlock Ted Williams as a free agent. Note: This also unlocks the power-up defense.Hit six consecutive homeruns in a game with the same batter in season mode and unlock Ted Williams as a free agent.

Ty Cobb:

Hit two triples in a single game in season mode to unlock Ty Cobb as a free agent. Alternately, win the World Series as the Detroit Tigers.

Willie Mays:

Get four diving catches or get a single, homerun, and a diving catch with the same player in a post-season game to unlock Willie Mays as a free agent.

Willie McCovey:

Hit three consecutive homeruns in season mode to unlock Willie McCovey as a free agent. Alternately, win the World Series as the San Francisco Giants.

Skinny players:

Hit a homerun with a player that weighs less than 160 pounds.

Large players:

Hit a homerun with a player that weighs over 250 pounds.

Invisible players:

Hit two triples with the same player in a single game in season mode.

Tiny players:

Get twelve hits with your team in a single game.

Fast players:

Steal every base in a single game or have one player get three stolen bases in a single game.

Tall players:

Have your team get eight hits in one game.

CPU assist:

Win a game by ten or more runs.

Pencil head:

Strike out six consecutive times when batting in season mode.

Big head:

Score four runs in a game with your team.

Huge head:

Score eight runs in a game with your team.

Pulsating head:

Score twelve runs in a game with your team.

Tiny head:

Get sixteen hits with your team in a single game.

Strong arm:

Get caught stealing more than twice in one game in season mode.

Power-up defense:

Get three double plays in a single game in season mode.

Note: This also unlocks Ted Williams.

Power-up offense:

Hit ten homeruns in one regular season game.

Power-up speed:

Steal two consecutive bases with the same player in season mode.

Big bat:

Hit two consecutive homeruns in season mode.

Pulsating bat:

Score five runs by the same player.

Flaming ball:

Throw six consecutive strike outs in season mode.

Big ball:

Throw nine consecutive strike outs in season mode.

Huge ball:

Throw six consecutive strike outs in season mode.

Big glove:

Make a diving catch to unlock the big glove.

Huge glove:

Make two diving catches in a game.

Pulsating glove:

Make three diving catches in a game