Apple&#x27;s &quot;Game Center&quot; (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Game_Center" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Game_Center</a>) provides integrated cross-game leaderboards and achievements&#x2F;badges.