Which is the most popular online game in Vietnam?

It's tricky to definitively say which online game is the most popular in Vietnam as popularity can fluctuate and depend on different metrics. However, some of the consistently popular online games in Vietnam include:

* League of Legends (LoL): This MOBA game remains incredibly popular worldwide, including Vietnam, with a dedicated player base and a thriving esports scene.

* Mobile Legends: Bang Bang (MLBB): Another popular MOBA game, but specifically for mobile devices, MLBB has gained immense popularity in Vietnam.

* PUBG Mobile: This battle royale game is a global phenomenon and enjoys significant popularity in Vietnam.

* Free Fire: Another mobile battle royale game that has garnered a large player base in Vietnam.

* Liên Minh Huyền Thoại: Tốc Chiến (Wild Rift): The mobile version of League of Legends is gaining traction in Vietnam and is likely to continue to rise in popularity.

* Đấu Trường Chân Lý (Teamfight Tactics): This auto-battler game, based on League of Legends, also has a significant following in Vietnam.

Beyond these titles, other popular genres in Vietnam include:

* MMORPGs: Games like Võ Lâm Truyền Kỳ and Kiếm Thế have long-lasting communities in Vietnam.

* Role-Playing Games (RPGs): Games like Final Fantasy XIV and Black Desert Online are gaining popularity.

* First-Person Shooters (FPS): Counter-Strike: Global Offensive (CS:GO) remains popular, and other titles like Valorant are rising.

Ultimately, the "most popular" game will depend on how you define popularity: by player base, by revenue, by esports involvement, or by cultural impact. Each of the games mentioned above is popular in its own right and contributes to the vibrant online gaming scene in Vietnam.