# ROM Guidelines

Delta Emulator only supports *some* systems and each one of those systems requires the ROM's file extension (for example: `.gba`) to be a specific extension in order for Delta to recognize the system to which the ROM belongs. To make things easier, the extension is not case-sensitive.

When importing ROMs into Delta, it is suggested that you import it as a `.zip` file. When creating the zip file, be sure to include only the ROM; if you zip a folder with the ROM inside, it will fail to import.

| Game System                        | Supported Extensions               |
| ---------------------------------- | ---------------------------------- |
| **Game Boy**                       | `.gb`                              |
| **Game Boy Color**                 | `.gbc` , `.sgb`                    |
| **Game Boy Advance**               | `.gba` , `.srl`                    |
| **Nintendo DS**                    | `.nds` , `.dsi` , `.srl`           |
| **Nintendo / Famicom**             | `.nes` , `.nez` , `.fc` , `.fds`   |
| **Super Nintendo / Super Famicom** | `.snes` , `.sfc` , `.smc` , `.fig` |
| **Nintendo 64**                    | `.n64` , `.z64` , `.v64` , `.ndd`  |

For an advanced breakdown of ROM formats please refer to the [Emulation General wiki.](https://emulation.gametechwiki.com/index.php/List_of_filetypes)