# Importing Games

Delta needs **ROMs** in order to play games. ROMs are special files containing a game's data.  There are many ways to get a game's ROM file, but we recommend using a tool like [GB Operator](https://www.epilogue.co/product/gb-operator) - though you can find other similar tools online.

Once you have a ROM, you can add it to your library by tapping '+' in the top right corner of Delta's main screen. The ROM must have one of the supported file extensions below.

<mark style="color:purple;">**Supported File Formats**</mark>

| System           | Accepted Formats      |
| ---------------- | --------------------- |
| NES              | .nes                  |
| SNES             | .smc, .sfc, .fig      |
| Game Boy         | .gb                   |
| Game Boy Color   | .gbc                  |
| Game Boy Advance | .gba                  |
| Nintendo DS      | .ds, .nds             |
| Nintendo 64      | .n64, .z64            |
| Sega Genesis     | .gen, .bin, .md, .smd |

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