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If you're like me, there are some games I could just never win as a kid. This guide will finally allow you to win! (albeit with a much lesser sense of satisfaction)

Download Cheats

As a preface cheats only work through libretro/retroarch so take note of the emulators you are using.

You first need to open the RGUI. There are two ways of accessing the RGUI:

• In the RetroPie menu of EmulationStation select Retroarchor
• Hotkey combinationHotkey+X to open the RGUI from within a game

If you haven't done so already, you'll need to enable the advanced settings by navigating to Settings >> User Interface >> Show Advanced Settings, then enabling the Online Updater in View >> Show Online Updater

Next, navigate to Online Updater >> Update Cheats

this will download a set of preconfigured cheat files for many games into /opt/retropie/configs/all/retroarch/cheats

Enable Cheats

Now you can launch the game you want to finally win:

Open the RGUI with Hotkey combinationHotkey+X

Choose Quick Menu >> Cheats >> Load Cheat File

Navigate to your game title and select it

Then navigate to the cheat you want to enable and press left or right to toggle it on/off

Select Apply Cheat Changes

Then press B to go out of the cheat menu and resume your game.

Your cheats should now be enabled

Create Cheat Files

You can create .cht files in /opt/retropie/configs/all/retroarch/cheats/<system>/<rom_name>.cht

The following is a reference chart for the types of cheat codes for each system:

Cheat Code Example

Filename: Addams Family, The - Pugsley's Scavenger Hunt (USA, Europe) (Game Genie).cht

Multiline Cheat Codes

The following is an example for a PSX game

Filename: Resident Evil 2.cht

Mame Cheats

Mame has its own configurations for cheats. You can see a guide HERE

Pause the game and press Up(2), Down(2), Left, Right, Left, Right, B, A, Start to fully upgrade all your weapons. Note: This code can only be entered once per level, as repeating it will cause death. Also, you must have an upgradeable weapon to avoid the death effect. This code does not work on the Easy difficulty setting.

Lose a life exactly when you gain an extra life to have 99 lives. A good way to do this is by killing the mini-Boss in Level 1 because you usually get an extra life. Get hit by one of the fireballs it shoots the instant you destroy it.

Successfully complete the game to unlock Challenge mode.

Successfully complete the indicated number of challenges to unlock the corresponding bonus:

NES Contra: 4
NES Super C: 8
Probotector character: 12
Nobuya Nakazato interview: 16
Lucia character: 20
Contra 3 comic: 24
Sheena Etranzi: 28
Jimbo and Sully from Contra 3: The Alien Wars: 36
Sound Test option: 40

Contra Nes Game Genie

Successfully complete the game. At the character selection screen, press Up or Down to choose an alternate color.

Successfully complete the game on the Normal or Hard difficulty setting to view an alternate ending.

Before the demonstration begins at the Contra title screen, press Up(2), Down(2), Left, Right, Left, Right, Y, B, Start.

Successfully complete the game to begin a new game in Hard mode.

At the Super C title screen, press Right, Left, Down, Up, B, Y.

Contra Game Genie Cheat Codes For Super Mario Bros 3

Nes Contra Game Genie Codes

As the game's logo is fading at the Super C title screen, hold Y + B and press Start.