Xbox One allows developers to add achievements to a game post launch, but Microsoft has taken steps to make sure players won't be overwhelmed with said achievements.
Speaking with OXM, Xbox Live's principal program manager Chad Gibson said the achievements can be released in weekly or even quarterly intervals in order to ensure continued interest in a gaming title.
"We're mindful and the corollary is that with a lot of games today, three updates later it's a nice evolution of that game - it's a different game that's been modified and adjusted, based on what people are enjoying and having fun with. And we think that Achievements should match that,"
"Especially if a game's been on the market for a while, and they have the opportunity to add all these new Achievements - if you start playing a game a year after it ships, there's probably 2000 Gamerscore to get for that game or more. And so, for the completionists, they're going to have more work to do
"We still have policies for developers to make sure that things don't get out of control. Like, we do not want a game offering 10,000 Gamerscore every day, so that user experiences are rational - users have an opportunity to complete everything without feeling constantly overwhelmed.
"A game developer could just take its Gamerscore budget and just, you know, dole it out every week if they wanted to. But, we don't want things to be out of control from a gamer perspective. We don't want people to be constantly overwhelmed with thousands and thousands of things for this game."
Xbox One is out sometime in November.