Use a Hex editor to edit the file INDY.COM and find the following bytes For infinite energy: search for 28 06 EF 03 change to 28 06 EF CF search for BF 26 04 80 7D 0A FE 72 01 change to BF 26 04 80 7D 0A FE 90 90 For infinite lives: search for 80 3E F0 03 00 74 03 change to 80 3E F0 03 00 90 90 search for E8 15 4A change to 90 90 90 search for E8 1D 4C change to 90 90 90.