public class CustomAchievementsExample {
    public CustomAchievementsExample (SGReborn sgReborn ) {
        AchievementAPI. registerAchievement ( new CustomAchievementExample ( ) ) ;
    }
    private static class CustomAchievementExample extends AbstractAchievement {
        public CustomAchievementExample ( ) {
            super (
                "Custom Achievement",            
                "CUSTOM",                        
                Arrays. asList ( "Complete a special task." ),
                "complete_special_task",        
                100,                            
                50                              
            ) ;
        }
        @EventHandler
        public void onPlayerCompleteSpecialTask (PlayerJumpEvent event ) {
            AchievementAPI. completeAchievement (event. getPlayer ( ), this ) ;
        }
    }
}
 

mmr:
    allowed: true
    starting-mmr: 1000
    suicide-scaling: 0.2
    k-factors: 0:1000:25,1001:1400:20,1401:1800:15,1801:2200:10,2201:3000:5
    default-k-factor: 25
    win: 1
    loss: 0
    ranks:
    - Bronze;0;§6[☰ Bronze]§r
    - Silver;1000;§7[⚪ Silver]§r
    - Gold;1400;§e[✪ Gold]§r
    - Platinum;1800;§b[◆ Platinum]§r
    - Diamond;2200;§3[❖ Diamond]§r
    - Champion;2600;§5[✦ Champion]§r