The watchdog gave the film an adult certificate for its depiction of "strong violence, language and some sexual content/nudity".
Vin Diesel previously said that the upcoming sequel would be R-rated, but there was some doubt as its predecessor The Chronicles of Riddick was a PG-13.
The movie sees the actor take on the role of the titular bounty hunter for a third time on screen, backed by a supporting cast that includes Karl Urban, Jordi Molla, Matt Nable and Katee Sackhoff.
Dredd star Urban previously revealed details of the project, describing it as having an "indie arthouse sensibility".
Directed by David Twohy, Chronicles of Riddick: Dead Man Stalking will arrive in theatres in 2013