1. Introduction of the game:
Last Shelter: Survival is an intense and immersive mobile strategy game that challenges players to build and defend their own post-apocalyptic city. Set in a world devasted by a deadly virus outbreak, players must gather resources, train their troops, and form alliances to survive in this hostile environment.

2. All characters and levels of the game:
In Last Shelter: Survival, players take on the role of a commander leading a group of survivors. They can recruit and train various types of troops, including infantry, vehicles, and snipers, each with unique abilities. As players progress through the game, they unlock new levels and areas to explore, encountering different challenges and enemies along the way.

3. What attracts users most to the game:
The game's captivating storyline and immersive world-building are key attractions for users. The post-apocalyptic setting adds an element of realism and urgency, creating a sense of purpose and excitement. Additionally, the game's strategic aspects, such as base building, resource management, and tactical combat, intrigue players who enjoy complex and challenging gameplay.

4. Why it is popular:
Last Shelter: Survival has gained popularity due to its engaging gameplay and constant updates that bring new features, events, and challenges to the players. The game also promotes social interaction by allowing players to join alliances, participate in joint missions, and compete against other players in intense PvP battles. This social aspect, combined with the game's addictive mechanics, keeps players coming back for more.

5. When the game was released and how many versions are currently available:
Last Shelter: Survival was initially released in 2018 and has since gained a loyal and active player base. Currently, the game has multiple versions available, each with its own unique events, features, and improvements, ensuring that the gameplay experience remains fresh and exciting.

6. The most difficult part of the game:
One of the most challenging aspects of Last Shelter: Survival is the constant threat of attack from both computer-controlled enemies and other players. Balancing resource acquisition, troop training, and defense preparations requires careful planning and strategy, making every decision crucial. The ability to adapt and react swiftly to unexpected situations is essential to survive in this harsh and unpredictable world.

7. Strengths and weaknesses of the game:
The strengths of Last Shelter: Survival lie in its immersive storyline, engaging gameplay, and social features that encourage interaction and collaboration. The game's stunning graphics and realistic sound effects further enhance the experience. However, some players may find that the game's microtransactions can create an unbalanced playing field, favoring those willing to spend real money. Additionally, the game's steep learning curve and strategic complexity may pose a challenge for casual gamers.

8. Other games developed by the same developer:
The developer of Last Shelter: Survival, Long Tech Network Limited, has created several other popular mobile games. Among their repertoire are Rise of Kingdoms, a real-time strategy game set in different historical periods, and Zombie Frontier 3, an intense first-person shooter game set in a zombie-infested world. These games also share a focus on immersive gameplay, strategic decision-making, and captivating narratives.