SCP is a world-wide containment facility which helps in containing anomalous entities, for example, monsters which possess abilities that defy the laws of this world. SCP stands for Secure [Securing the world from entities], Contain [Containing the entities] and Protect [Protecting humanity]. All entities are given a special designation, for example SCP - 999 or SCP - 2736. SCP's are classified into 3 categories based on their difficulty to contain them, Safe, Euclid and Keter. You can get more info on google, but I have absolutely no idea how this is related to minecraft.
