> ## Documentation Index > Fetch the complete documentation index at: https://docs.nudj.cx/llms.txt > Use this file to discover all available pages before exploring further. # Challenge Types > The flavours of challenges you'll encounter Challenges differ in how often you can complete them, when they're available, and how they're grouped. This page covers the behaviours you'll actually see — not every community uses all of them. ## One-off vs repeatable * **One-off** challenges can be completed once per member. After completion they move to the completed state and don't appear in the active list. * **Repeatable** challenges can be completed multiple times. They can repeat on a schedule (every day, every week) or after a cooldown. Completed repeats are tracked separately and shown in a repeatable history carousel on the challenge detail page. ## Scheduled challenges A scheduled challenge has explicit start and end times. Before it starts, you may see a preview or coming-soon state. After it ends, it disappears from active lists. Admins can also schedule challenges to auto-invalidate pending rewards when the end date passes. ## Challenge groups and journeys Admins can bundle related challenges into **groups** or **journeys**. Groups display multiple challenges together, sometimes with a shared theme or reward track. Journeys enforce an order — you finish one challenge to unlock the next. ## Stamp cards and Lite journeys Some communities use **stamp card** or **Lite journey** presentations — a visual track where each completed challenge stamps a card. Progress is displayed as a filled-in card rather than a percentage bar. These are driven by the same underlying challenge data, just with an alternative visual. ## Locked challenges A challenge may be locked until you: * Complete a prerequisite challenge. * Reach a minimum XP level. * Meet a custom community condition (for example, a tier requirement). Tap the lock on the challenge card to see the specific unlock criteria. ## Challenge variants in the UI Regardless of type, challenge detail pages come in two styles: * **Default** — a standard detail layout. * **Modern / parallax** — an immersive scrolling hero layout used when the community opts in. The type of the challenge doesn't change which layout is used; that's a community-wide theme choice. ## Related What happens when you start one. The completion screen.