These are plugins/features that have been implemented by Jraylor into SCP: Secret Shenanigans. This has been done to add more variety towards the gameplay, and to also add a bit more fun too. There's loads to make use with, so enjoy them all you want!
End-Round Friendly Fire
Auto-Nuke - 20 Minutes
SCPChat - SCPs can talk
Hold item in 914 to upgrade
New UI Spectator Menu!
A nice menu for you. From here, you can view:
The wait time until next spawn.
Some funny hints.