Ferals.io is a multiplayer, evolution-based, survivor game similar to slither-snake, battle-arena games. A player must evolve their character from a tiny insect into a wide range of animals until it becomes a powerful dragon or other mythic animal.
The player starts by choosing a name and a location to play as a guest or creating an account and profile. Some areas of the game are only available to players who have accounts. The player then starts to evolve their insect by making it eat food, such as red meat, honeycombs, cheese, strawberries, greens, mushrooms, corn, cabbage and seeds, and collecting water from pools scattered among plants, holes and rocks.
The game allows the player to improve their animal's evolution by attacking other animals. It provides a minimap that shows enemies as bright dots on a black background, features holes with tunnels that change the camera perspective for a few seconds to reveal nearby food and animals and supplies food and attack hints. For example, after each evolution, the game tells the player to make their animal eat specific foods and defeat certain types of animals.
Edible sources of food and easy-to-defeat animals are labeled with a green circle. Any partially red area attached to the green or a red circle around another animal highlights a bad attack point or warning, respectively. Every animal upgrade features unique defensive and offensive moves that the player can use with onscreen buttons as well.
