How do I launch Terminal while in macOS Sierra Recovery Mode? I just installed macOS Sierra and when I log into the Recovery mode, I do not have the Utilities menu in it. Only the 4 options, Restore From Time Machine Backup, Reinstall macOS, Get Online Help and Disk Utility. 

How can I access Terminal from OS Recovery?
This is a bug in the recovery Mode, also the same issue if you create a USB Device for install. Try to load Recovery Mode again and choose one the the four available options that should get the menu back.

I've tried boot from USB Device three times until the menu was visible.