Eidos Montreal is the developer behind Deus Ex: Human Revolution and its sequel, as well as Marvel's Guardians of the Galaxy. 

Previously under the ownership of Square Enix, the company was acquired by Embracer Group, which announced that a new Deus Ex was in development. 

In 2009, the studio also developed a reboot of another famous immersive sim - Thief - but it wasn't as well received as the Deus Ex reboot.