1. Introduction of the game:
Trials Frontier is an exciting and addictive mobile racing game developed by RedLynx and Ubisoft. It offers players a thrilling and challenging experience as they navigate through a variety of tracks and obstacles on their motorcycles.

2. All characters and levels of the game:
In Trials Frontier, players can choose from a diverse range of characters, each with their own unique abilities and personalities. Whether it's the fearless daredevil, the skilled mechanic, or the cunning trickster, there is a character to suit every player's style.

The game offers a multitude of levels set in different colorful and immersive environments, including deserts, forests, mountains, and even futuristic landscapes. Each level presents its own set of obstacles and challenges, pushing the players' skills and determination to the limit.

3. What attracts users most to the game:
One of the major attractions of Trials Frontier is its addictive gameplay. The game combines elements of racing, physics-based challenges, and skillful maneuvering to create an engaging experience that keeps players coming back for more.

Moreover, the game offers a compelling storyline that unfolds as players progress through the game, adding a layer of depth and immersion that captures the interest and curiosity of users.

4. Why it is popular:
Trials Frontier has gained immense popularity due to its dynamic gameplay and engaging features. The game's intuitive controls allow players of all skill levels to enjoy the experience, while its challenging levels and competitive multiplayer mode provide a constant sense of achievement and excitement.

Additionally, the game's regular updates and free expansions contribute to its popularity, keeping the content fresh and offering new challenges to players.

5. When the game was released and how many versions are currently available:
Trials Frontier was released on April 10, 2014, and has since become a hit among mobile gamers. Currently, several versions of the game are available, providing players with a wide range of new tracks, features, and enhancements.

6. The most difficult part of the game:
The most difficult part of Trials Frontier lies in mastering the physics-based gameplay mechanics. Balancing speed, control, and momentum while navigating treacherous obstacles requires precision and excellent timing. The game tests players' skills and patience, often challenging them to find creative solutions to overcome seemingly impossible barriers.

7. Strengths and weaknesses of the game:
Trials Frontier boasts various strengths that contribute to its success. The game's stunning graphics and immersive environments create a visually appealing experience. Additionally, its addictive gameplay, regularly updated content, and multiplayer mode enhance replayability and foster a competitive community.

However, one potential weakness lies in the game's monetization model, as it offers various in-app purchases that may disrupt the balance of fair competition. Nevertheless, this aspect can be managed by dedicated players who prefer skill progression over monetary advantages.

8. Other games developed by the same developer:
RedLynx and Ubisoft have developed other popular games, including the critically acclaimed Trials series, which started with Trials HD and continued with Trials Evolution and Trials Fusion. These games share the same physics-based racing concept and have garnered a dedicated fan base around the world.