On the flip side, there's achievements.
So, achievements are goals that you can set within a game.
If you have visible achievements, or ones that users know are out there, and
they know this because they can go to Game Center and
look at all the achievements that are possible within a game.
They can possible see them within your game if you implement that, but when you
present achievements to a user, it gives them goals, things that they can try and
do or things that they can aspire to within your game, those are the visible.
But you can also have hidden achievements and these are more like prizes or
rewards that are given to players in order to just surprise them,
delight them, indicate to them that they're making progress.
But they function in a different way.
They're not so much goal setting, as they are prizes, secret prizes.
When you're thinking about achievements,
you could achievements to show the breadth of your game.
So, one thing you can do is use achievement, visible achievements,
to encourage users to try out all the different ways of playing your game.
Maybe there are different ways you can set goals for
yourself, there are other things that you can try and optimize in the game.
You can try and play collaboratively or competitively.
Maybe you can play for giving as many things or
as getting as fast as you want, something like that.
So you can use different kinds of achievements to encourage
trying out different ways of navigating through a game.
You can also use achievements to help players find secret parts of the game or
less frequently explored parts of the game.
Within the ecosystem of achievements, Apple has designed achievements to
have sort of an economic model, or sort of an economy within the game.
And this isn't something that is exposed very clearly to users,
I mean they can see it in game center.
But I think it's more designed to structure achievements across
multiple games.
So each iOS achievement has a number of points associated with it and
when you register them you have to pick how many points they're worth.
Every app can have a total of a thousand achievement points.
Every app can have up to a hundred different achievements.
Each one of those achievements uses a certain amount of points, and you have to
budget them so that you're achievements don't go over a thousand points.
Any single achievement can't have more than a hundred points.
So, for example, You could have ten achievements each worth a hundred points,
and that would add up to a thousand points.
Or you could have a hundred achievements each worth ten points and
that would add up to a thousand.
Or you could use different amounts of points in order to indicate the relative
difficulty of different achievements.