1. Introduction of the Game:
Auto Chess is an innovative online multiplayer strategy game that fuses elements of chess with real-time strategy. Players face off on a battlefield that resembles a chessboard, where they deploy and upgrade various units in an effort to outmaneuver and outlast their opponents. With its unique gameplay mechanics that emphasize skill, strategy, and adaptability, Auto Chess presents a thrilling challenge for gamers looking to test their tactical prowess.

2. All Characters and Levels of the Game:
The game features a wide array of characters, commonly referred to as 'chess pieces,' each with its own unique abilities, strengths, and synergies. These characters are often categorized by class and race, with certain combinations unlocking powerful bonuses. The levels, or rounds, progressively get harder, with players facing increasingly difficult opponents and neutral creeps that offer valuable loot to strengthen one's lineup.

3. What Attracts Users Most to the Game:
Players are mostly attracted to the deep level of strategy involved in Auto Chess. The game requires thought-out planning for piece placement, economy management, and timing of upgrades. Additionally, the element of randomness with item drops and the pool of available pieces means no two games are ever the same, offering high replayability.

4. Why It Is Popular:
Auto Chess has gained popularity due to its engaging gameplay that combines strategy with elements of luck, ensuring that every match is unpredictable and exciting. The social aspect, through in-game chat and competition with friends and online players, also adds to its appeal. Moreover, the game's regular updates, balancing, and fresh content keeps the community engaged.

5. The Most Difficult Part of the Game:
One of the most challenging aspects of Auto Chess is managing the transition from the early to the late game while staying ahead of the competition. This includes deciding when to save or spend in-game currency, when to upgrade levels, and how to adjust strategies based on the evolving state of the board.

6. Strengths and Weaknesses of the Game:
Strengths of Auto Chess include its strategic depth, diverse character roster, and vibrant community. However, weaknesses might involve a steep learning curve for beginners, the potential for RNG to affect outcomes, and the time commitment required to excel at higher competitive levels.

7. What Other Games Have Been Developed by the Same Developer:
The developer of Auto Chess, [insert developer name], has also worked on other titles that vary based on the developer. For example, if the developer is Drodo Studio, they are mainly known for the original Auto Chess mod for Dota 2 and the standalone Auto Chess game. However, if another developer is referred to, such as Valve or Tencent, they would have other games associated with them, such as Dota 2 for Valve and Arena of Valor for Tencent.