Aftershock Obviously Only R-Rated on US DVD/BD
The Chilean-American co-production Aftershock started in US cinemas in May 2013. Since the original version of the film has some brutal elements, the MPAA ruled that it was to be classified with the NC-17 rating. Not very good if you want to make money in cinemas. Therefore, the distributor decided to apply cuts in order to achieve the "R" rating.
And it seems that only this censored theatrical version will be included on the upcoming US DVD and Blu-ray by Anchor Bay. On August 6th, 2013, the stores will carry it. An unrated version is currently not announced but since Aftershock is no pure US production, chances are that the uncut version might surface in other countries outside of the US. A little patience may be advised. If you don't believe that it comes to that or are just fine with the theatricla version, then you can order it at Amazon.com or Amazon.co.uk.