1. Introduction of the game:
Dragon City is a captivating and immersive mobile game that allows players to build and manage their own dragon utopia. With an enchanting storyline and vibrant graphics, players are transported into a fantastical world filled with mythical creatures, where their ultimate goal is to become the greatest Dragon Master.

2. All characters and levels of the game:
In Dragon City, players will encounter a wide variety of dragons, each possessing unique abilities and attributes. From the majestic Fire Dragon to the cunning Ice Dragon, there are countless species to discover and collect. As players progress through the game, they can breed different dragon combinations to unlock rare and powerful creatures. Additionally, there are numerous levels and challenges to conquer, ranging from taming wild dragons to participating in intense tournaments.

3. What attracts users most to the game:
One of the main attractions of Dragon City is the ability to breed and collect an extensive range of dragons, allowing players to showcase their creativity and strategic skills. The game offers endless possibilities for creating unique dragon combinations, which provides a sense of accomplishment and personalization. Furthermore, the vibrant visuals, engaging gameplay, and regular updates contribute to a highly addictive and enjoyable experience.

4. Why it is popular:
Dragon City has gained immense popularity among players due to its exceptional gameplay mechanics and dynamic features. The game provides a balanced blend of strategy, exploration, and competition, appealing to a wide audience. The social aspect of Dragon City, allowing players to connect with friends and engage in friendly battles, further enhances its popularity. Moreover, the regular introduction of new dragons, events, and challenges keeps the game fresh and exciting, inviting players to constantly improve and expand their dragon collection.

5. When the game was released and how many versions are currently available:
Dragon City was released in May 2012 for Facebook, and it quickly gained a massive following. Due to its success, the game was later made available for Android and iOS devices. As of now, Dragon City has evolved through several versions, with the latest being Version X, which offers enhanced gameplay, improved graphics, and exclusive events.

6. The most difficult part of the game:
The most challenging aspect of Dragon City lies in breeding and acquiring the rarest and most powerful dragons. Obtaining these dragons requires careful planning, resource management, and a deep understanding of breeding combinations. Players must invest time and effort in unlocking and breeding unique hybrids, as well as strategizing their dragon team compositions for various battles and tournaments.

7. Strengths and weaknesses of the game:
Dragon City boasts several strengths, such as its visually stunning graphics, intuitive gameplay mechanics, and regular updates that keep players engaged. The game's social features and the ability to connect with friends provide an enhanced multiplayer experience. However, one potential weakness is the reliance on in-app purchases for faster progression, which may disadvantage players who do not wish to spend real money.

8. What other games have been developed by the same developer:
The developer of Dragon City, Social Point, has created other popular games such as Monster Legends, World Chef, and Dragon Land. Each of these games encompasses unique gameplay elements and has garnered a sizable player base, making Social Point a reputable developer within the mobile gaming industry.