The most popular game at the end of 2020 is obviously Cyberpunk 2077. CD Projekt Red are known for their love for hidden treasures and this time they also hid many Easter eggs in the game.
One of which is the reference to the Mortal Kombat universe. It is not available by default, and you need to complete the "I'll Fly Away" side job. It will be available after you will help Panam with the GIG and Mitch will call you inviting you to help him out. Once you complete it, you unlock the "Get over here!" achievement and a Scorpion figurine as memorabilia. You can display the Scorpion Figurine on V's coffee table inside the apartment.