The following are known Game Genie Codes for R.B.I. Baseball 3 on SEGA Genesis.

• Game Begins With Inning 2
  AJKA-CAHR
• Game Begins With Inning 3
  ANKA-CAHR
• Game Begins With Inning 4
  ATKA-CAHR
• Game Begins With Inning 5
  AYKA-CAHR
• Game Begins With Inning 6
  A2KA-CAHR
• Game Begins With Inning 7
  A6KA-CAHR
• Game Begins With Inning 8
  BAKA-CAHR
• Game Begins With Inning 9
  BEKA-CAHR
• Game Begins With Player 1 Leading 1-0
  AAKT-CCA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 2-0
  AAKT-CEA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 3-0
  AAKT-CGA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 4-0
  AAKT-CJA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 5-0
  AAKT-CLA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 7-0
  AAKT-CRA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 1 Leading 9-0
  AAKT-CWA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 1-0
  AEKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 2-0
  AJKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 3-0
  ANKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 4-0
  ATKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 5-0
  AYKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 7-0
  A6KT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Game Begins With Player 2 Or Computer Leading 9-0
  BEKT-CAA8
  STKT-D0J6
  8TKT-CLBA
  REKT-C6VC
• Batter Walks On 2 Balls
  AK9T-AAA4
  ALAA-AAEN
  AJET-CABG
• Batter Walks On 3 Balls
  AP9T-AAA4
  ARAA-AAEN
  ANET-CABG
• Batter Walks On 5 Balls
  AZ9T-AAA4
  A0AA-AAEN
  AYET-CABG
• Batter Walks On 6 Balls
  A39T-AAA4
  A4AA-AAEN
  A2ET-CABG
• Balls Do Not Count (Batter Never Walks)
  AK9A-AA9G
• Unrestricted Substitutions For Batting Team
  AA3A-AAH4
• Unrestricted Substitutions For Fielding Team (Except Pitchers)
  ABAA-AAA0