1. Introduction of the game:
Legends of Runeterra is an immersive, strategic digital card game that takes place in the enchanting world of Runeterra. Developed by Riot Games, the creators of the wildly popular League of Legends, this game offers an unparalleled card gaming experience that combines deep strategic gameplay with stunning visuals and a rich lore.

2. All characters and levels of the game:
Legends of Runeterra features a diverse cast of characters from the League of Legends universe, each with their own unique abilities and playstyles. From the powerful mages of Ionia to the mighty warriors of Demacia, players can build their own deck of champions and create synergistic combinations as they compete across various levels and game modes. With regular updates, new characters, and levels continue to be added, ensuring a constantly evolving gaming experience.

3. What attracts users most to the game:
What sets Legends of Runeterra apart and captures the attention of users is its strategic depth and skill-based gameplay. The game rewards thoughtful decision-making, clever tactics, and strategic deck-building. Its balanced gameplay, where luck takes a backseat to skill, has gained a dedicated following of competitive players who relish the opportunity to outsmart their opponents.

4. Why it is popular:
Legends of Runeterra has witnessed immense popularity due to its accessibility and player-friendly approach. Unlike other card games, it places emphasis on rewarding players based on skill rather than overpowering card collections, ensuring a level playing field for both newcomers and veteran gamers alike. Its engaging visuals and immersive storytelling, which brings to life the vibrant world of Runeterra, also contribute to its widespread popularity.

5. When the game was released and how many versions are currently available:
Legends of Runeterra was released on April 30, 2020. Since its launch, Riot Games has continued to refine and expand the game, resulting in the availability of multiple versions and updates to address user feedback, introduce new features, and maintain a fresh and evolving gaming experience.

6. The most difficult part of the game:
The most challenging aspect of Legends of Runeterra lies in its intricate decision-making process and strategic depth. Players must carefully manage their resources, predict their opponent's moves, and plan their own strategies to achieve victory. Mastering the various card interactions, understanding the meta, and adapting strategies to counter different playstyles can present a significant challenge even to seasoned players.

7. Strengths and weaknesses of the game:
A major strength of Legends of Runeterra is its balanced gameplay that focuses on skill and strategy rather than pay-to-win mechanics, earning it respect and praise within the gaming community. The game's stunning visuals, immersive world, and regular content updates showcase the commitment of Riot Games to provide an engaging and evolving gaming experience. However, some players may find the learning curve steep due to the complex interactions and in-depth understanding required to excel, which might discourage casual players looking for a more straightforward experience.

8. Other games developed by the same developer:
Riot Games, the developer of Legends of Runeterra, is renowned for its other highly successful game, League of Legends. Considered the most popular PC game in the world, League of Legends revolutionized the competitive gaming scene and garnered a devoted fan base. Riot Games has also developed other titles, including Teamfight Tactics, Valorant, and Wild Rift, each showcasing their commitment to creating immersive and engaging gaming experiences across multiple genres.