Server Level Up System

[ElariaRO 1]

Hello I request this script. If anyone is able to do it feel free to

Server Level Up System

What it should do: 

It has to check how many EXP the whole playerbase does.

If a certain amount of EXP was gained a map will be unlocked.

Maps that can be unlocked should be able to set through script.

There has to be an announcement when the playerbase reached 25,50, 75 and 100% of the needed EXP to unlock a map.

Needed EXP has to be visible through a NPC for every player.