Nemo is gone, but his machines have opened a whole new world to us! The floors of Neptune's seas lay open to us, ready to surrender their bounties. Equip and upgrade your mining machines, then guide them to the rich mineral seams beneath the ocean. Control the supply of resources to bend the market to your will. Become the master of Nautilus Industries!

In the game, players take on the role of an enterprising business owner, with each trying to exploit the riches of the sea as well as the marketplace to earn the most money by the end of the game. Players take a series of simple actions, such as programming a mining robot, increasing warehouse capacity, swapping mining zone order, or purchasing stocks.

Each round, players have three actions they must take before the market phase. During this phase, players collect and sell resources, in turn order. Each sea zone is mined in a specific order, and players have the option each round to sell or hold their resources for a later round. When resources are sold, the market price of that resource decreases to reflect the supply/demand of that resource; stocks of the company using that resource also increase in value. Accordingly, if a resource is not sold, the market price for that resource increases. Players must decide when to sell and when to hold. Should you flood the market to bring down the price so your neighbor makes less money? Do you think the player beside you will hold out for a higher price, or will they sell just to spite you?

Nautilus Industries is easy to learn because of the simple actions you take, yet dynamic because of the way the markets, stocks, and players affect the gameplay.