Tynan Muddle at Aussie-Gamer.com writes: "A fourth game has been granted the R18+ rating in Australia, just 24 days after the new classification was introduced."
This time, PlayStation Vita title Ninja Gaiden Sigma 2 has been slapped with the restrictive rating, meaning persons under the age of 18 are unable to buy the title. The rating is questionable considering the exact same title was released in 2009 under the MA15+ rating."
