> For the complete documentation index, see [llms.txt](https://sdk.metamarket.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.metamarket.tech/releases-and-reference/glossary.md).

# Glossary

Terms used across these docs, with the page that covers each in depth.

| Term                    | Meaning                                                                                                                                                                                                          | Where                                                                   |
| ----------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------- |
| App / tenant            | A registered game or platform module: one row in the app registry, one `app_id`, its own isolated data.                                                                                                          | [Roles and permissions](/architecture-and-trust/users-and-actors.md)    |
| Archetype               | The trust level assigned to an app at registration (`system`, `friend_of_system`, or `external`); decides which door its clients use and what it can reach.                                                      | [Roles and permissions](/architecture-and-trust/users-and-actors.md)    |
| Door                    | The entry path a client uses: the game door (through the edge gateway) or the platform door (direct to the engine).                                                                                              | [Integration Overview](/evaluate-and-integrate/integration-overview.md) |
| Edge gateway            | The proxy external game clients go through; holds the app secret server-side so the client never sees it.                                                                                                        | [Integration Overview](/evaluate-and-integrate/integration-overview.md) |
| Game engine             | The per-game engine that runs each tenant's own local economy, quests, and content.                                                                                                                              | [Architecture Overview](/architecture-and-trust/product-overview.md)    |
| Hub                     | The platform-wide authority for player identity, the app registry, and the shared balance.                                                                                                                       | [Architecture Overview](/architecture-and-trust/product-overview.md)    |
| GG (Global Gold/Gems)   | The platform currency, held on the shared balance. A player receives it through a platform-owned bridge quest that reacts to a reported milestone; a game cannot mint, credit, read, or move it.                 | [Local and Shared Economies](/core-concepts/shared-economy.md)          |
| Loyalty points          | A second platform currency, credited like GG through platform-owned quests such as a daily login reward; it is spent only through platform-operated workflows such as burning and badge upgrades, not by a game. | [Local and Shared Economies](/core-concepts/shared-economy.md)          |
| Loyalty tier            | A player's standing (base, Bronze, Silver, Gold), computed live from the loyalty-points balance; platform-owned.                                                                                                 | [Local and Shared Economies](/core-concepts/shared-economy.md)          |
| Badge                   | A platform-owned collectible flag earned by reaching a tier, or upgraded from Gold to Platinum by spending points; changes happen only through platform-operated workflows, not by a game.                       | [Local and Shared Economies](/core-concepts/shared-economy.md)          |
| Meta App                | The first-party portal client that lets a player move between a platform home screen and individual games under one login.                                                                                       | [Architecture Overview](/architecture-and-trust/product-overview.md)    |
| Pool / slot / cartridge | The delivery layer: a pool holds slots, a slot holds one baked content instance, and the pair `(slotId, itemSlug)` is its stable address across refreshes.                                                       | [HTTP API](/evaluate-and-integrate/api-guide.md)                        |
| Package                 | The reward abstraction: grant, store, open, fulfill. A one-shot delivery.                                                                                                                                        | [Rewards and Inventory](/core-concepts/rewards-and-inventory.md)        |
| Bundle                  | A refillable store of consumable charges with a regeneration rule, as opposed to a package's one-shot delivery.                                                                                                  | [Resources and Quotas](/core-concepts/resources-and-quotas.md)          |
| Listing                 | A player-created, one-shot sale of an owned item, priced by the seller and escrowed at listing time; scoped to one game.                                                                                         | [Marketplace Workflows](/use-cases/marketplace.md)                      |
| Scope                   | How an action or resource writes its value: `target` (a named entity), `root` (account-wide), or `none`.                                                                                                         | [App Configuration](/evaluate-and-integrate/app-configuration.md)       |
| Connected games         | Several games one studio runs on the platform, sharing player identity, the platform currency, and loyalty standing.                                                                                             | [Local and Shared Economies](/core-concepts/shared-economy.md)          |