Mysterious ruins found under the sea shed light onto a long-forgotten civilization. It's time to find out if anything still lurks beneath! Enhance your experience underwater with: 10 new tracks (including eight Classic Trials Tracks, one Skill Game and one FMX Track), 24 new Challenges (including secret locations and hidden mini-games), 5 new achievements, and dozens of new Editor objects (including Titanic statues, emissive stone ramps, underwater robotics).