Tunnel Rats, also known as 1968 Tunnel Rats, is a 2008 German-Canadian war suspense film written and directed by Uwe Boll. The film is based on the factual duties of tunnel rats during the Vietnam War. In a documentary for the film, Boll revealed the film did not have a script, and instead the actors improvised their lines. The box office return was poor, but Tunnel Rats was met with positive reviews. Plot A group of US Army soldiers, trained in underground warfare, arrive at base camp in the jungle of South Vietnam. The soldiers spend the first day and night getting to know each other. The next morning they begin to explore the Viet Cong's tunnel network at Củ Chi. Led by Lieutenant Vic Hollowborn (Michael Pare) along with Platoon Sergeant Mike Heaney (Brad Schmidt) Corporal Dan Green (Wilson Bethel) and Privates Peter Harris (Mitch Eakins), Carl Johnson (Erik Eidem), Terence Verano (Rocky Marquette), Jonathon Porterson (), Dean Garraty (Adrian Collins), Samuel Graybridge (Brandon Fobbs), Jim Lidford (Nate Parker) and Bob Miller (Jeffery Christopher Todd). Armed with nothing more than bayonets, pistols, grenades and flashlights, the US soldiers take to the tunnels in search and destroy operations, and begin to encounter dangers including primitive but lethal booby traps, such as punji sticks, grenades rigged with tripwire, as well as roving Viet Cong troops. Meanwhile, Garraty and Johnson are killed first, and later Sergeant Heaney and Verano are both killed as Green escapes, and up on the surface Harris and Lidford escape to the bottom of the tunnel, and Lidford is killed later on, Porterson successfully escapes through the tunnels. On the surface, the Viet Cong also attack the US base. As things escalate above and below the ground, soldiers for both sides are pushed to the limits of their humanity. Miller and Graybridge try to escape, with the former barely making it, but Graybridge is killed. The events implicate that all (or almost all) the protagonists are killed by each other, by boobytraps, or by the airstrike ordered by the wounded US commanding officer Hollowborn, who called on it when everything seemed to have been lost. Green dies in the tunnels. Harris convinces Vo Mai (Jane Le) that he isn't a threat to her or her family. Porterson retreats to the surface and later meets Miller at the camp where many soldiers have been slaughtered by the North Vietnamese