Summary from iTunes - "Ready for a spine-tingling sequel to your favorite adventure? Plunge into Nightmares from the Deep: The Siren’s Call, an epic adventure featuring frightening foes and heart-pounding twists!"
Searched for the G5 games and saw the first few 'Free' but with in-app purchases, whereas this is paid version, but free :D
the game is usually £4.99 and is rated 5*! G5 tend to make interesting games :)
Deals link takes you to thhe iPad version. Also available for the iPhone - https://itunes.apple.com/us/app/id695109705?mt=8