1. Introduction of the game
Monster Legends is an enthralling strategy and role-playing game that plunges players into a mythical world populated by fantastic creatures. Developed by Social Point, this game engages players in breeding, raising, and battling a host of unique monsters. With a mix of simulation elements and turn-based combat, it allows gamers to create their monster paradise, explore diverse habitats, and assert dominance in action-packed arena battles.

2. All characters and levels of the game
The game features an ever-expanding universe of characters, with hundreds of monsters to collect, each possessing unique abilities and attributes. From fire-breathing dragons to enigmatic sea creatures, the array of characters ensures a rich and varied gameplay experience. Players progress through multiple levels that increase in difficulty, with each stage offering new adventures, challenges, and the chance to unlock exclusive monsters.

3. What attracts users most to the game
Monster Legends captivates users with its deep strategizing component, allowing for a high degree of customization in building the ultimate monster squad. Additionally, the game’s social aspects, including team wars and multiplayer battles, offer a communal space for player interaction and competition, further enhancing its allure.

4. Why it is popular
The popularity of Monster Legends stems from its engaging tactical gameplay, vivid graphics, and an extensive collection of monsters that cater to a broad audience of players. Its consistent updates and events keep the content fresh and exciting, cultivating a dedicated and growing community of fans.

5. When the game was released and how many versions are currently available
Monster Legends was first released on June 12, 2014. Since its launch, it has received numerous updates and iterations, continually evolving with new features and improvements to maintain its appeal and expand upon the original creation. Given that such games are continuously updated rather than re-released as separate versions, there is technically a single evolving version of Monster Legends that exists today.

6. The most difficult part of the game
The game's increasing level of challenge is evident in the Team Wars and the PvP Arenas, where players face off against strategically sophisticated opponents with high-level monsters. Crafting a winning strategy against experienced players and achieving victory in these competitive modes represents the game's pinnacle challenge.

7. Strengths and weaknesses of the game
Among its strengths, Monster Legends boasts a robust breeding system, a wide variety of monsters, and regular updates that keep gameplay engaging. On the flip side, the game's reliance on in-app purchases for faster progression may deter some users, and the complexity of managing resources and monsters might overwhelm newcomers to the genre.

8. What other games have been developed by the same developer
Social Point, the developer behind Monster Legends, is also known for creating the wildly popular Dragon City, a game with similar breeding and battling mechanics. Additionally, they have developed titles such as World Chef, Tasty Town, and Dragon Land, each offering unique gameplay experiences and expanding their presence in the mobile gaming market.