> For the complete documentation index, see [llms.txt](https://wiki.ragnaroklibre.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.ragnaroklibre.com/game-system/dungeon/central-laboratory.md).

# Central Laboratory

1. #### **What is the Central Laboratory?**
   * The **Central Laboratory** is a dungeon where you can try out different job characters and obtain **Experiment Fragments**.
     * The performance of other job characters is influenced by your own character’s **Job** [**level**](/characters/level.md) and **class advancement**.
     * Experiment Fragments can be used to craft **Lab Archives** or enhance the [**Sharevice**](/game-system/sharevice.md).
   * This content becomes available once you reach **Job Level 50**.

2. **How to Play**
   * Upon entering, you can choose one [Skill](/characters/skills.md) from a variety of skills available to the [Job](/characters/job.md) Character.
     * Each time you clear a stage, you can choose and enhance additional skills.
   * During gameplay, when the **item gauge** at the bottom fills up, you’ll acquire an item that provides a useful effect.
     * These items can be used strategically to help clear stages.
   * A **Boss Monster** appears every **5 stages**.
   * Clearing all **15 Stages** completes the current level of the Central Laboratory