# Gameplay Systems

- [Currencies Manager](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/currencies-manager.md): Presented by ICurrenciesManager interface, this system operates with in-game currencies. You can add or withdraw them via this manager, as well as get information about specific currency.
- [Player Progression Manager](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/player-progression-manager.md): Presented by IPlayerProgressionManager interface, this system works with player progression: levels and experience.
- [Quest Manager](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/quest-manager.md): Presented by IQuestManager interface, this system provides functionality for processing quests.
- [Random Events Manager](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/random-events-manager.md): Presented by IRandomEventsManager interface, this system works with random events and provides such mechanisms like Bad Luck Protection and Good Luck Protection for them.
- [Hittables Manager](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/hittables-manager.md)
- [Dungeon Generator](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/gameplay-systems/dungeon-generator.md)


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