NAM, sold under the name Napalm in Walmart retail outlets, is a first-person shooter set during the Vietnam War. It was developed for MS-DOS by TNT Team and published by GT Interactive in 1998. A direct sequel, World War II GI, was released in 1999.
The game is very similar to Duke Nukem 3D. The game consists of 34 levels divided into four episodes; there are two single player episodes with fifteen levels and two multiplayer episodes with nineteen levels. Very little was changed in regards to controls, movement rate, physics, and CON (control file) language. The only immediately noticeable change in the game code was the removal of the remote detonator for weapon 6, the grenade, which was a pipebomb in Duke Nukem 3D. In the game, there are AI marines which will help the player in some levels, each with different classes and specialties. Mines are present in most levels, requiring players to activate his mine detector.