Firaxis has been doing a series of monster reveals from their next game, XCOM 2. The latest in the series is an alien known only as the Faceless. It's the creepiest monster they've revealed to date, and it promises to give all your XCOM operatives nightmares after they encounter it.
Through the power of genetic manipulation, the Faceless is capable of transforming from an ordinary looking human into a towering monstrosity. In its altered state, the alien stands nearly two stories tall, with an exaggerated reach and strength relative to its form.
Here's a GIF showing its transformation.
XCOM 2 is slated for release on February 5, 2016 on the PC.