Aquanaut's Holiday lets you play as a submersible, exploring the ocean depths at your own pace.
You can swim through the water from first-person view, discovering sunken ships, statues and other treasures along the way. You can also use sonar to talk to sea creatures like whales or unusual deep-sea animals.
As you play, you can leave underwater stations to mark interesting things for later, or build a special coral reef that will grow and attract more marine life over time.
The game focuses on finding new things instead of fast action and collecting points.