For avid Sci-Fi fans this movie is just what you've been waiting for. Watching this movie gets you lost into the characters, especially Riddick, the movies bad guy. This is the case where you root for the bad guy and want to see him live and win. As you watch the survivors struggle to stay alive you long to see who lives and how they survive these unknown creatures that have taken over this planet. An excellent movie, Vin Diesel did a wonderful job as convict Riddick and the acting and suspense were ravishing.A+