# Cross-Game Products/Data

### Setting up game parenting

<figure><img src="/files/G84XSrE9SM2ZpbheUhsy" alt=""><figcaption></figcaption></figure>

When you set the parent game ID for a game it will pull all of its API data from the parent game allowing you to share data across your games.

#### Types of data shared:

* Products & Player Purchases
* Player save data
* Game wide save data
* Leaderboards
* Generated assets

If you only want to share **some** data (for example if you have separate xp systems for each game) you can prefix your save keys with the current game ID in code.

Use `Game.get_game_id()` to fetch the ID at runtime:

```csl
// little helper you can write to make this easier
get_scoped_key :: proc(local_key: string) -> string {
    return format_string("%:%", {Game.get_game_id(), local_key});
}

save_player_xp :: proc(player: Player, xp: s64) {
    Save.set_int(player, get_scoped_key("xp"), xp);
}

load_player_xp :: proc(player: Player) -> s64 {
    return Save.get_int(player, get_scoped_key("xp"), 0);
}
```

### Migrating Data Between games

{% hint style="warning" %}
If you did not set up game parenting initially and need to do so retroactively please contact us to migrate each game's data to the parent game first. This is a manual and potentially error prone process (if you have keys with the same name in each game already) so we highly suggest you consider this up front!
{% endhint %}


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