1. Introduction of the Game:
Guns of Glory is a thrilling multiplayer strategy game that immerses players in a world of warfare, diplomacy, and alliances. Set in an era blending elements of the medieval and the renaissance, it allows players to build their own empire, raise a formidable army, and join forces with friends to defeat enemies on the battlefield. This real-time strategy game combines base-building with tactical combat, ensuring a dynamic gaming experience.

2. All Characters and Levels of the Game:
The game features a range of characters including the Musketeers, who guide players through their journey, and various customizable airship and estate guardians. Players can upgrade their characters' abilities as they progress. Levels in Guns of Glory are tied to the player's estate, with each level up offering the opportunity to unlock new buildings, troops, and abilities. Achieving higher levels increases the challenge and complexity of the game.

3. What Attracts Users Most to the Game:
Players are mostly attracted by Guns of Glory's strategic depth, social interaction through alliance systems, and the thrilling combat sequences. The rich and detailed graphics, coupled with the opportunity to strategize with others around the globe, add to an enthralling gaming experience that captivates its audience.

4. Why It Is Popular:
Guns of Glory has gained popularity due to its engaging gameplay, where users can not only compete but also form alliances, making it not just a game of war but also of diplomacy. The well-integrated mix of strategy, role-playing, and base management elements, along with regular updates and events, keep the game interesting for both new and veteran players.

5. When the Game Was Released and How Many Versions Are Currently Available:
Guns of Glory was released globally on September 21, 2017. Since its release, it has periodically been updated with new features and improvements. There are updates rather than new versions, which include event additions, new gameplay features, and various optimizations that are rolled out to enhance the player's gaming experience.

6. The Most Difficult Part of the Game:
One of the most challenging parts of Guns of Glory is managing resources effectively while expanding and defending your empire against well-coordinated attacks from other players or alliances. Strategic planning and timely responses to adversaries are critical, making high-level gameplay both challenging and complex.

7. Strengths and Weaknesses of the Game:
Strengths of Guns of Glory include its diverse gameplay elements, social interaction, excellent graphics, and active community. However, the game can be quite intricate, which might overwhelm new players. Additionally, the game's progression can feel slow without in-app purchases, leading to a pay-to-win impression for some elements.

8. What Other Games Have Been Developed by the Same Developer:
The developer, FunPlus, also boasts other successful titles in the strategy and simulation game genres, such as "King of Avalon", "State of Survival", and "Z Day: Hearts of Heroes". Each of these games has its own unique setting and gameplay mechanics but shares the commonality of engaging strategic gameplay.