The following are known Game Genie Codes for Crack Down on SEGA Genesis.

• Start At Stage 2
  9W6T-BCKL
  AW6T-AABN
• Start At Stage 3
  9W6T-BCKL
  BC6T-AABN
• Start At Stage 4
  9W6T-BCKL
  BW6T-AABN
• Player 1 Starts With 1 Life
  AC6T-AACG
  WW6T-BCCJ
• Player 1 Starts With 2 Lives
  AC6T-AACG
  YC6T-BCCJ
• Player 1 Starts With 6 Lives
  AC6T-AACG
  V46T-BECJ
• Player 1 Starts With 11 Lives
  AC6T-AACG
  R46T-BECJ
• Player 1 Starts With 26 Lives
  AC6T-AACG
  Z46T-AG4J
• Player 2 Starts With 1 Life
  AC6T-AAD4
  WW6T-BCD6
• Player 2 Starts With 2 Lives
  AC6T-AAD4
  YC6T-BCD6
• Player 2 Starts With 6 Lives
  AC6T-AAD4
  V46T-BED6
• Player 2 Starts With 11 Lives
  AC6T-AAD4
  R46T-BED6
• Player 2 Starts With 26 Lives
  AC6T-AAD4
  Z46T-AG56
• Player 1 Starts With 50 Machine Gun Rounds
  AC6T-AAC6
  FC6T-AG48
• Player 1 Starts With 100 Machine Gun Rounds
  AC6T-AAC6
  GW6T-BLL8
• Player 1 Starts With 50 Cannon Rounds
  AC6T-AADG
  FC6T-AG5J
• Player 1 Starts With 100 Cannon Rounds
  AC6T-AADG
  GW6T-BLMJ
• Player 1 Starts With 6 Super Bombs
  AC6T-AADT
  6C6T-BRDW
• Player 1 Starts With 9 Super Bombs
  AC6T-AADT
  8C6T-BRDW
• Player 1 Has Infinite Super Bombs
  AVMT-AA5W
  AVNA-AA4R
• Player 2 Starts With 50 Machine Gun Rounds
  AC6T-AAET
  FC6T-AG6W
• Player 2 Starts With 100 Machine Gun Rounds
  AC6T-AAET
  GW6T-BLNW
• Player 2 Starts With 50 Cannon Rounds
  AC6T-AAE4
  FC6T-AG66
• Player 2 Starts With 100 Cannon Rounds
  AC6T-AAE4
  GW6T-BLN6
• Player 2 Starts With 6 Super Bombs
  AC6T-AAFE
  6C6T-BRFG
• Player 2 Starts With 9 Super Bombs
  AC6T-AAFE
  8C6T-BRFG
• Player 2 Has Infinite Supply Of Super Bombs
  AVMT-AA76
  AVNA-AA2G
• Player 1 Continues With 1 Life
  ADMT-AADL
  WXMT-BCDN
• Player 1 Continues With 2 Lives
  ADMT-AADL
  YDMT-BCDN
• Player 1 Continues With 6 Lives
  ADMT-AADL
  V5MT-BEDN
• Player 1 Continues With 11 Lives
  ADMT-AADL
  R5MT-BEDN
• Player 1 Continues With 26 Lives
  ADMT-AADL
  Z5MT-AG5N
• Player 2 Continues With 1 Life
  ADNA-AAFT
  WXNA-BCFW
• Player 2 Continues With 2 Lives
  ADNA-AAFT
  YDNA-BCFW
• Player 2 Continues With 6 Lives
  ADNA-AAFT
  V5NA-BEFW
• Player 2 Continues With 11 Lives
  ADNA-AAFT
  R5NA-BEFW
• Player 2 Continues With 26 Lives
  ADNA-AAFT
  Z5NA-AG7W
• Continue With 0 Machine Gun Rounds Instead Of 30
  ADST-AAGY
• Continue With 10 Machine Gun Rounds
  BMST-AAGY
• Continue With 50 Machine Gun Rounds
  GMST-AAGY
• Continue With 100 Machine Gun Rounds
  NXST-AAGY
• Continue With 0 Cannon Rounds Instead Of 30
  ADST-AAG0
• Continue With 10 Cannon Rounds
  BMST-AAG0
• Continue With 50 Cannon Rounds
  GMST-AAG0
• Continue With 100 Cannon Rounds
  NXST-AAG0
• Continue With 0 Super Bombs Instead Of 4
  ADST-AAG2
• Continue With 2 Super Bombs
  AMST-AAG2
• Continue With 5 Super Bombs
  A1ST-AAG2
• Continue With 9 Super Bombs
  BHST-AAG2
• Infinite Lives Player 1
  BDMA-AA9E
• Infinite Lives Player 2
  BDNA-AA3N
• Get First 1-Up At 1,000 Points
  1K3T-FBFC
  6B3T-EOPE
  JV3T-EL7G
• Get 2nd, 3rd, Etc., 1-Ups Every 10,000 Points
  HV3T-FEP8
  AF3T-EAGA
• 1-Up Worth Nothing
  RF3T-E60R
• 1-Up Worth Double
  LK3T-FJ0R
• 1-Up Worth Triple
  LK3T-FN0R