WBIE offers new Power of Shadow DLC for Middle-earth: Shadow of Mordor as a free release for owners of the Tolkien-inspired action game. This is available on Steam along with a paid Test of Wisdom pack. Here's word from Steam News:

Power of Shadow: Strike terror into your enemies as Sauron's most fearful Servant, the Black Hand, and upgrade your Sword, Dagger and Bow to be weapons of renown with the Runes of Power bundle.

Test of Wisdom: Prove your strategic abilities in this Challenge Mode as you pit yourself against the most highly trained Legion of Sauron’s Forces. Earn points for skill, speed and efficiency and build your Legend on the Leaderboards.