When you create achievements that truly surprise and delight your players as they make their way through a game, you can help elicit a feeling of accomplishment, or even make the player laugh. Most of us have experienced playing games where we have unlocked some kind of achievement or trophy that stirs some of these emotions. This is exactly what we want you to consider when you create Game Center achievements for your apps or games — and at WWDC21, we’re challenging you to show the developer community your best, funniest, strangest, and most delightful achievements.
Begin the challenge

Our final achievements challenge focuses on sequencing achievements to encourage people to complete a specific set of tasks. Progress-based achievements are the most common types of rewards players can earn, and coupling some of them together can help create an even stronger narrative within your app or game.
Whether your game is divided into chapters, levels, or some other way, today’s challenge is to create a series of at least 2-3 achievements that break up the narrative in a unique and interesting way. Think about how you might add titles and descriptions in both the locked and unlocked versions of the achievement that indicate to the player these are connected together and need to be unlocked in that specific order. (And as always, bonus points for puns and amazing alliteration.)
We welcome all achievements, new, old, existing, or imaginary: Show off your “Series Finale” achievements from one of your existing apps or games, or put your wordsmithery to work and create an entirely new set of achievements. You can share these with the developer community on the Developer Forums using the tag “WWDC21-Challenges,” or on Twitter using the hashtag #WWDC21Challenges.
Best of all, we’ve made it easy for you to participate and dream up awesome achievements even if you haven’t yet implemented Game Center or you want to try writing something entirely new: Just download the attached Game Center achievement template.
Explore WWDC21 Challenges on the Developer Forums
Explore #WWDC21Challenges on social media
Best practices for great achievements

It’s a lot of fun to create unique and engaging achievements to connect people with your app or game. Below are a few of our recommendations when thinking about writing and designing achievements.
Be creative with an achievement’s title, but straightforward with its descriptionAlthough most people appreciate entertaining titles, they expect an achievement’s description to specify how to earn it. If you were to create a WWDC21 achievement, for instance, you might write the following:
Title: Code Completionist
Description: Watched every WWDC21 Code-Along session.Be succinctThe Game Center achievement card limits your title and description to two lines each before truncating the text — brevity is key to a great achievement.
Think inclusivelyFollow the Human Interface Guidelines around inclusivity when creating achievements. The best jokes, puns, and wordplay are those that are intuitive and friendly to everyone who might interact with your app or game, and make players feel recognized and rewarded.
Add unique, high-quality imagesPeople appreciate earning unique achievements that remind them of each accomplishment. When you create custom artwork, you can help that achievement stand out from the others in your app or game and make it more recognizable to people who interact with it.
You can learn more about how to design great achievements in Apple’s Human Interface Guidelines, and in the WWDC20 session “Design for Game Center.”

  • WWDC20

Design for Game Center

 Download the Achievement Unlocked Challenge material
Learn more about designing achievements
Read the WWDC21 Challenges Terms and Conditions


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