Hà Nội 12 Ngày Đêm developed by Pirex Games is a strategy game that is based on the Vietnam War. The game aims to recreate part of the Battle of Dien Bien Phu in the air, a fierce battle fought by the people of Hanoi against the US imperialist's B-52 strategic bombing campaign in late DecemberThis battle forced the US government to sign the Paris Agreement, bringing peace to northern Vietnam.

The game is set in Hanoi, where players take on the role of a commander who must defend the city from the enemy's attack. The game offers a variety of gameplay modes, including campaign mode, skirmish mode, and multiplayer mode. Players can choose from a range of military units, including infantry, tanks, artillery, and air support. The game's graphics and sound effects are impressive, providing players with an immersive experience.