If you want the game to automatically start with 30 lives (so you don't have to enter the code every time), you are looking for a or a "Game Genie ROM" .
For decades, players whispered about a myth: a version of Super C that gave you from the start. No Konami Code. No Game Genie. Just a ROM patch that rewired the game’s core survival loop. super contra 30 lives nes rom better
To get 10 lives instead of the default 3, use this code at the title screen Right, Left, Down, Up, A, B, Start. If you want the game to automatically start
A hacker uses a hex editor to change #$03 to #$1E (30 in hex). That’s it. One byte. But the hack often goes further: No Game Genie
If you aren't using a modified ROM, you can still achieve a "better" experience through these methods: Life Farming:
Searching ROM archives reveals multiple versions: