In addition to the basic NPC quests, the game also featured an overarching goal of players finding and completing the quests given by twelve 'Esrohs', each of which took considerable time and effort.

Several elements of the original game were retained, including the ability to find and catch wild horses, quests given by NPCs, mining for valuable gems, and puzzles and riddles scattered around the world for players to complete. Horse Isle 2 featured an enlarged version of the original map, introducing many new 'isles' and towns for players to visit. Horse Isle 2: Legend of the Esrohs was released in 2010, with a single server supporting previous and migrating players of Horse Isle 1. Given a Flash workaround, the game is still available to play. In 2020, following the end of support for Adobe Flash Player in most browsers and its subsequent demise, Horse Isle 1 became the victim of a number of hacks, with the game's data became highly compromised and eventually unplayable, beginning in June and taking place periodically until October of that year, at which point the game was declared unsustainable and was labelled 'end-of-life'. In 2015, the game experienced a number of DDOS ( distributed denial of service) attacks. Subscribed players could also own and build ranches, which increased the number of horses they could own, as well as using features such as wells and training pens to water and train all their horses simultaneously. The main features of the game included being able to catch wild horses, undertake quests given by non-playable characters to earn money, compete in a number of competitions such as showjumping and racing, and chat with friends using the chat feature. The game went live on, after extensive beta-testing undertaken by the Durbins and volunteers. Horse Isle 1: The Secret Land of Horses was created in 2006 by Joe Durbin, with the aim of creating a horse game geared towards young girls. In 2010, the game had a player base of around 10,000 players. The game also features parental language filters. The artwork in the first two games is two-dimensional in Horse Isle 3, the game is three-dimensional, allowing players to create avatars based on real-life appearances. The game also features a system wherein players can earn money to purchase their own horse ranch.

The game offers a number of different horse breeds, mini-games and arena competitions for players to take part in many of the minigames feature educational elements, focusing on mathematics, science and problem-solving. Horse Isle is set in a fictional world wherein players can capture, take care of, train and breed horses. 2 Horse Isle 1: The Secret Land of Horses.

Horse isle 3