Message Sent is a hidden achievement featured in Call of Duty: Infinite Warfare on the zombies map The Beast from Beyond. It requires the player to send the Turnstile piece from the Shaolin Shuffle easter egg back to the past.
To achieve this, the player must first obtain the Entangler. Once the player has the Entangler, they must use the time machine device outside of the facility to open a rift to the 1970s. Once the rift is open, the player must hurry to the outside of Wyler's theater and grab the piece of the Turnstile within the dumpster holding the KBS Longbow with the Entangler. Bring the Turnstile piece to the rift and launch it from the Entangler, which will send the piece back in time and close the rift, unlocking the achievement.