Both Alien and Leatherface are playable DLC characters in Mortal Kombat X.
Below you can check out a pair of videos featuring their gameplay and fatalities.
Mortal Kombat X is NetherRealm Studios’ most recent installment in its legendary, critically acclaimed fighting game franchise that propels the iconic franchise into a new generation. Awarded as the “Best Fighting Game” from 2015 The Game Awards and named one of “2015’s Best Games” from Yahoo! Games, Mortal Kombat X combines cinematic presentation with all new gameplay to deliver the most brutal Kombat experience ever, offering a new fully connected experience that launches players into a persistent online contest where every fight matters in a global battle for supremacy.