1. Introduction of the game
Rise of Kingdoms: Lost Crusade is an engaging mobile strategy game that immerses players in a real-time, vast multiplayer world brimming with historical intrigue. The game challenges players to build and develop their own civilization, manage resources, engage in diplomacy, and lead armies to conquer new territories. With a unique "unending world map," all in-game actions take place on a single, enormous map inhabited by players and NPC characters.

2. All characters and levels of the game
The game boasts a wide array of characters, known as Commanders, each with unique abilities, traits, and historical backgrounds. These Commanders span various cultures and civilizations, including Julius Caesar from Rome, Sun Tzu from China, Joan of Arc from France, and many others. Players progress by leveling up these Commanders, upgrading their cities, and advancing through the game's technologies to unlock new units and abilities. Levels vary in difficulty, with higher-level challenges requiring more strategic planning and stronger armies.

3. What attracts users most to the game
Many users are drawn to Rise of Kingdoms for its combination of deep strategic gameplay, real-time battles, and the freedom to choose alliances or play solo. The game's attention to historical detail and the variety of Commanders provide an educational edge, while its social elements and interactions create a highly communal gaming experience. Additionally, the game's expansive world map and the ability to control troops in real-time add a level of excitement and immersion that keeps players engaged.

4. Why it is popular
Rise of Kingdoms is popular because it delivers a versatile gaming experience where players can engage in either PvE or PvP combat, explore the map for hidden treasures, and join together in powerful alliances for massive wars. The game also receives regular updates, keeping the content fresh and the community actively engaged. Comprehensive and approachable mechanics ensure that both newcomers to strategy games and seasoned veterans can enjoy the gameplay.

5. The most difficult part of the game
One of the most challenging aspects of Rise of Kingdoms lies in mastering the alliance system and succeeding in the late-game battles, where strategic collaboration with other players becomes crucial. Defending against and organizing large-scale alliance wars requires substantial commitment, understanding of game mechanics, and tactical thinking.

6. Strengths and weaknesses of the game
Rise of Kingdoms' strengths include its expansive world map, the diversity of Commanders and civilizations, the fluidity of real-time gameplay, and the depth of its strategic elements. However, some players may find the game has a steep learning curve, and there have been discussions concerning the balance between free-to-play participants and those who purchase in-game advantages.

7. What other games have been developed by the same developer
Lilith Games, the developer behind Rise of Kingdoms, is also responsible for several other successful mobile titles, including AFK Arena, a casual idle RPG that has gained popularity for its artistic style and simplified gameplay, and Art of Conquest, another strategy game that blends MMO and RTS elements. Lilith Games continues to create engaging mobile experiences with a focus on innovative gameplay and community-driven content.