Valis III.

 No.  Code  Effect
   1  AYNT-AAFA  Start game at Act 2
   2  BYNT-AAFA  Start game at Act 3
   3  YANA-BK38 + NTGT-AAC6  Game clock starts at 100--all scenes
   4  YANA-BK38 + 3AGT-AAC6  Game clock starts at 200--all scenes
   5  YANA-BK38 + FTGT-ACC6  Game clock starts at 300--all scenes
   6  YANA-BK38 + 8TGT-ACC6  Game clock starts at 500--all scenes
   7  YANA-BK38 + 66GT-AGC6  Game clock starts at 999--all scenes
   8  SAFA-AADT  Game clock runs slower
   9  EAFA-AADT  Game clock runs faster
 10  CJFA-AA58  Freeze clock (no time limit)
 11  AAGA-AAHY  Start with 1 life instead of 3
 12  AEGA-AAHY  Start with 2 lives
 13  AJGA-AAHY  Start with 3 lives
 14  ATGA-AAHY  Start with 5 lives
 15  A2GA-AAHY  Start with 7 lives
 16  A2ET-AA8G  Infinite lives
 17  BCMA-AA2R  HP (life) gauge never loses energy
 18  AK2A-AA52  MP (magic) gauge never loses energy
 19  JCCA-BAYW  Small heart increases HP gauge by 8
 20  BWCA-BA6R + SCCA-BBYT + J4CA-BK6W    Small heart increases HP gauge by 12
 21  A4CA-AA6W  Small heart restores HP gauge to full
 22  CLCA-AA6R  Small heart worth same as large heart
 23  RCCA-AA6R  Small heart worth same as 1-up
 24  AWCA-AAFJ  Large heart increases HP gauge by 4
 25  BLCA-AAFJ  Large heart increases HP gauge by 10  
 26  DCCA-AAFJ  Large heart restores HP gauge to full
 27  MWCA-AA7C  Large heart worth same as 1-up
 28  JCCA-BTOT  B-magic increases MP gauge by 4
 29  CCCA-BA8N + SCCA-BB0R + KLCA-BK8T  B-magic increases MP gauge by 16
 30  A4CA-AA8T  B-magic restores MP gauge to full
 31  JCCA-B2Z6  S-magic increases MP gauge by 6
 32  BWCA-BA72 + SCCA-BBZ4 + KLCA-BK76  S-magic increases MP gauge by 12
 33  A4CA-AA76  S-magic restores MP gauge to full
 34  CLCA-AA72  S-magic worth same as B-magic
 35  JCCT-BJTE  1-up worth 2 lives instead of 1
 36  JCCT-BTTE  1-up worth 4 lives
 37  JCCT-B2TE  1-up worth 6 lives
 38  RGCT-A6TE  1-up worth nothing