Food Chain Island is a single-player strategy game about combining animal cards to get one of them to the top of the food chain. You can only stack animal cards if their predator number is higher, which leads to a web of decisions with unintended consequences. It's a unique twist on Solitaire where the position of your animal cards matters as much as their value.

To start, you shuffle your animal cards and arrange them into a 4-by-4 grid. Each card represents an animal in the Island's food chain and contains an image, the number of creatures that they can eat and any special rules that you must follow when you move that card.

One at a time, you move one animal card on top of another, provided they are higher up the food chain number on the card. The aim is to carefully plan each of your moves so that you always have the next turn and can make your way to an island with only one animal left.

As you progress, you need to choose each move carefully, considering the impact of each move on the evolving geography of the island and your overall chances of success. What starts as a relaxing Solitaire-like game, becomes a fiendish logic puzzle that takes much head-scratching to complete successfully.