The reason why Legend of Mir 2 was so popular back then was mainly because it provided a challenging and exciting online game world. In the game, players could play various roles to experience various adventures and challenges, and they could also interact and communicate with other players. The Legend of Mir 2 also had rich game content, including various spells, weapons, and equipment, as well as rich game modes and missions. These elements made the Legend of Mir 2 an attractive game that attracted a large number of players to experience. The Legend of Mir 2 also had good social functions, including online chat, team quests, trading, and so on. These features made the Legend of Mir 2 a community that attracted a large number of players to participate in and share the fun of the game. To sum up, the reason why Legend of Mir 2 was so popular back then was that it provided a challenging and exciting online game world. It had rich game content and good social functions, which made it a popular game for players.