1. Introduction of シャドウバース (Shadowverse) game:
シャドウバース (Shadowverse) is a popular digital collectible card game that combines strategic gameplay, stunning visuals, and an immersive world. Developed by Cygames, this game offers players a unique and captivating experience as they battle against opponents in intense card duels.

2. All characters and levels of the game:
シャドウバース (Shadowverse) features a diverse cast of characters known as leaders, each representing different factions and possessing unique abilities. With each leader, players can explore multiple levels and challenges, unlocking new cards and strategies along the way. From the valiant swordsmen of Swordcraft to the mystical spellcasters of Runecraft, there is a playstyle for every gamer.

3. What attracts users most to the game:
The most enticing aspect of シャドウバース (Shadowverse) is its deep strategic gameplay. Players must carefully construct their decks, considering card synergies, abilities, and strategies to outwit their opponents. With frequent updates and expansions, the game constantly introduces new cards and mechanics, keeping users engaged and excited to create unique and powerful decks.

4. Why it is popular:
シャドウバース (Shadowverse) has gained immense popularity due to its immersive artwork and compelling storytelling. The visually stunning card designs, coupled with captivating animations and sound effects, transport players into the rich and vibrant world of the game. Additionally, the game's comprehensive tutorials and user-friendly interface contribute to its widespread appeal among both casual and hardcore gamers.

5. When the game was released and how many versions are currently available:
シャドウバース (Shadowverse) was initially released in Japan in June 2016 and then expanded globally. Currently, the game has multiple versions available, including the main core set and several expansion sets that introduce new cards, mechanics, and gameplay elements.

6. The most difficult part of the game:
One of the most challenging aspects of シャドウバース (Shadowverse) is mastering the complex decision-making required during matches. Players must carefully manage their resources, plan their card plays, and predict their opponents' strategies. With a myriad of possible tactics and counterplays, every move counts, making each match a thrilling and mentally demanding experience.

7. Strengths and weaknesses of the game:
シャドウバース (Shadowverse) stands out for its strong visual aesthetic, compelling storytelling, and strategic depth. The game offers a wide variety of cards, leaders, and playstyles, allowing players to tailor their decks to their preferences. However, some players may find the learning curve steep, especially when faced with experienced opponents or complex card interactions.

8. Other games developed by the same developer:
Cygames, the developer of シャドウバース (Shadowverse), is known for creating other successful games such as "Granblue Fantasy," a popular mobile RPG, and "Rage of Bahamut," another well-received card battle game. These titles showcase the developer's expertise in creating immersive and engaging gaming experiences.