A free program for Windows, by N-fusion.

In Elite Warriors: Vietnam, players take on the roles of both a military and a civilian agent as they work to complete various missions. These missions vary in their objectives and nature, which can lead to different strategies and tactics being used. As a military agent, the player will need to use their knowledge of stealth, shooting, and combat techniques to complete their missions. They will also need to consider the effects of their actions on their teammates, as well as the enemy soldiers and their commanders.

In this game, you will engage in highly classified operations, rescue downed pilots, ambush convoys, seize enemy prisoners, and more. You will also experience becoming a leader and trainer that will ensure your team is prepared and well-equipped. 

The creators of this game based on the Vietnam war distribute the editor as a free package that allows you to build your own levels. With the tools in this zip you can create new maps, missions, and campaigns for EWV.