Stay safe, and happy blasting.
ROMhacking.net — The best place to find that add 30 lives or the Konami Code to your existing Super C ROM. Quick Tips for Survival What is the Contra code for 30 lives? - Facebook
Depending on which regional version (ROM) you are playing, the code and the number of lives granted vary: Super C (North American Version): Right, Left, Down, Up, A, B, Start. Super Contra / Probotector II (Japanese/European Versions): Right, Left, Down, Up, A, B, Start. Original Contra (for comparison): Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start. Download Considerations
If you are looking to download the game for an emulator, it is important to use reputable sources to avoid malware. Community-trusted sites often mentioned by retro gamers include: Vimm's Lair — Known for its clean, verified library.
At the title screen, press Right, Left, Down, Up, A, B, Start .