Vĩnh Hằng Kỷ Nguyên-Kỵ Sĩ Rồng is a medieval-themed MMOARPG game developed by Vision Network Viet Nam Joint Stock Company for the iPhone platform. The game revolves around the search for 25 lost magic rings, each with immense power, and the challenges that come with it. Along with searching for magic rings, you can also team up with mythical creatures, engage in guild battles, PK monsters, and bosses to earn loot, and accumulate wealth.

The game features stunning graphics with beautiful European medieval landscapes and lively characters. The Unity 3D engine powers the game, and it has been developed with great attention to detail. The game also offers a unique trading system where you can sell the equipment you earn from killing bosses or completing quests. PvP is allowed on all maps, and you can team up with other players to defeat high-level opponents. The game also offers a variety of mounts and elegant equipment to enhance your gaming experience.