Megaquarium

Megaquarium is a business simulation game created and published by Twice Circled.

Gameplay
Players are tasked with managing an aquarium by building fish tanks and populating them with various flora and fauna to attract paying guests. Predatory fish must be kept apart from their prey, and coldwater fish must be isolated from warm water.

Staff, hired by the player, manage filtration systems and maintain the aquarium. Customers must be kept happy by satisfying their food, beverage, resting, and toiletry needs.

Gameplay supports both campaigns (which doubles as a tutorial) and a sandbox mode. Zooming in fully allows players to experience their own aquarium from a first person perspective.