Several humvees are found in the Dead Rising series. There are two humvees in Dead Rising, they are very fast and durable trucks. Humvees are more in number in Dead Rising 2: Case Zero and Dead Rising 2 when the military enter the infected towns for clean-up.
One is driven and operated by the Convicts, and found in Leisure Park. This can be obtained anytime during the game starting at 6pm on the first day. There are three convicts in the first humvee, Sam Franklin drives, Reginald Jenkins fires the heavy machine gun mounted on the rear of the vehicle, and Miguel Sanchez is armed with a baseball bat.
The second humvee is driven by Isabela Keyes and Frank West during their escape from Willamette, which was nearly destroyed by Brock Mason in Overtime Mode. It is unknown who was firing the heavy machine gun, but it is thought to be Isabela, as she was in the gunner seat in cutscenes, and occasionally screams when hit during the actual battle.
At the Quarantine Zone, the bridge has been permanently closed with a barricade, consisting of barbed wire and three abandoned Humvees. Later, when the military arrives to clear out Still Creek, more Humvees can be found around town, having transported soldiers into the area and forming a makeshift barricade.
The military arrive via Humvees in Fortune City by crossing the outer bridge and entering through the once-locked gates in Fortune Park. Unfortunately, the military rescue operation failed as the gas zombies tore apart the military squads, zombifing and killing many. The Humvees were destroyed as soldiers attempted to escape but many crashed and exploded in the process. One of the surviving soldiers, Dwight Boykin, drives a Humvee to the Underground Tunnels and makes a last stand trying to protect Rebecca Chang.
The Humvee is an excellent way to level up Frank. By simply driving over the hundreds of zombies gathered in Leisure Park can gain Frank massive Prestige Points. The truck will break if rammed into trees, walls and other objects too many times as well as idling in a pond.