Lil Nas X

Obtainability:
Teleport to the RBB map.

Go to the theater, where there should be a big stage.

Next to the stage are two doors. Go into any one of the two doors.

Next to a white couch with a purple safe on it, there should be a black chest next to a potted plant. If you look closely, you will see a microphone there. Touch it to get the LNX badge.

After touching the microphone, you will get the LNX skin.