Achievement based Milestones?

[Yourname942]

Version

1.12.2

What Should Be Added or Changed?

As a client I want to be rewarded for surviving up until x level of difficulty, and to have achievements to show my progress.

Optional:

1. reward the player with: a) an achievement that shows up in chat/ a progression tree b) a chest containing a configurable loot per milestone
2. allow for a configurable amount of milestones (level of difficulty to reach)

Why Should This Be Done?

This would make me feel accomplished for surviving a certain amount of difficulty levels, and excited with anticipation for the next milestone/reward.