---
key: mechanic/progression-rewards--t242
type: mechanic
id: progression-rewards--t242
lang: en
title: 'Achievements, challenges and mastery'
summary: >-
  A challenge sets a separate mastery criterion and recognizes execution beyond
  ordinary objective completion.
updatedAt: '2026-10-22'
status: active
url: 'https://gamemechanics.pro/en/knowledge/mechanic/progression-rewards--t242/'
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/progression-rewards--t242.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/progression-rewards--t242.md
aliases:
  - Achievements and challenges
tags:
  - 'Progression, rewards and retention'
  - Mechanics and variants
sourceIds:
  - source-3817d420df0baa92
  - source-ea407a6c37045737
sources:
  - id: source-3817d420df0baa92
    title: 'Robert Nystrom: State'
    url: >-
      https://github.com/munificent/game-programming-patterns/blob/master/book/state.markdown
    verifiedAt: null
  - id: source-ea407a6c37045737
    title: Monster Train
    url: 'https://store.steampowered.com/app/1102190/'
    verifiedAt: null
relations:
  - type: uses
    direction: outgoing
    label: Sources in the selection
    key: resource/state-pattern
    title: 'State: Game Programming Patterns'
    url: 'https://gamemechanics.pro/en/resources/#resource-state-pattern'
    jsonUrl: 'https://gamemechanics.pro/api/v1/knowledge/en/resource/state-pattern.json'
    markdownUrl: 'https://gamemechanics.pro/content/knowledge/en/resource/state-pattern.md'
placements:
  - catalogId: progression-rewards
    id: t242
    title: 'Progression, rewards and retention'
    url: 'https://gamemechanics.pro/en/mechanics/progression-rewards/#t242'
    categoryIds:
      - mechanics
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Achievements and challenges
    description: >-
      A challenge sets a separate mastery criterion and recognizes execution
      beyond ordinary objective completion.
    image:
      src: images/mechanics/monster-train-challenge.webp
      width: 1440
      height: 810
      game: Monster Train
      sourceUrl: 'https://store.steampowered.com/app/1102190/'
      originalUrl: >-
        https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/1102190/ss_482b7d543a1e5773eb469b4702258b7eb34f2da1.1920x1080.jpg?t=1779381275
      credit: Shiny Shoe / Good Shepherd Entertainment
      rights: © Shiny Shoe / Good Shepherd Entertainment. All rights reserved.
      caption: Distinct challenge conditions in Monster Train
      alt: Distinct challenge conditions in Monster Train
      markers:
        - x: 50
          'y': 44
          label: Parameters of a distinct challenge
    tips:
      - Describe the checked condition and show progress toward it.
    examples:
      - title: Monster Train
        url: 'https://store.steampowered.com/app/1102190/'
endsAt: null
provenance: >-
  Original bilingual editorial overviews authored for gamemechanics.pro on
  2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design
  examples; prototype checks describe work to perform, not completed playtests.
  Primary sources support the stated techniques and implementation context, not
  every proposed variant.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/progression-rewards
---
# Achievements, challenges and mastery

id: progression-rewards--t242
type: mechanic
key: mechanic/progression-rewards--t242
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/progression-rewards--t242/

A challenge sets a separate mastery criterion and recognizes execution beyond ordinary objective completion.

## At a glance

![Distinct challenge conditions in Monster Train](https://gamemechanics.pro/images/mechanics/monster-train-challenge.webp)

[Monster Train](https://store.steampowered.com/app/1102190/) · © Shiny Shoe / Good Shepherd Entertainment. All rights reserved.

1. Parameters of a distinct challenge

- Describe the checked condition and show progress toward it.

- [Monster Train](https://store.steampowered.com/app/1102190/)

## How it works

A challenge sets a separate mastery criterion and recognizes execution beyond ordinary objective completion.

## Variants

### Mechanic variants

<a id="t242-variants"></a>

- Medals distinguish levels of execution quality. <a id="t242-v1"></a>
- Restrictions remove a familiar powerful tool. <a id="t242-v2"></a>
- Records preserve the best result of an attempt. <a id="t242-v3"></a>
- Streaks test consistent execution without mistakes. <a id="t242-v4"></a>

## Design example

A level allows an ordinary route, while a separate medal requires avoiding stationary platforms.

Prototype check: Test immediate feedback for a broken challenge rule and retrying without unnecessary waiting.

## Context and limits

Progression changes player options and goals; rewards should explain new decisions and preserve useful stopping points. Each overview separates player actions, state changes and alternative rules. Examples are hypothetical design scenarios, not claims about a named game. A prototype check states an observable question for the next iteration. Existing detailed references remain separately linked from the direction map.

## Connected materials

- Sources in the selection: [State: Game Programming Patterns](https://gamemechanics.pro/en/resources/#resource-state-pattern) (key: resource/state-pattern)

## Sources and provenance

Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant.

- [Robert Nystrom: State](https://github.com/munificent/game-programming-patterns/blob/master/book/state.markdown) (id: source-3817d420df0baa92)
- [Monster Train](https://store.steampowered.com/app/1102190/) (id: source-ea407a6c37045737)

CC-BY-4.0 · gamemechanics.pro contributors