The levels of "Duke Nukem 3D" take the player outdoors and indoors, on the street, inside military bases, deserts, flooded cities, space stations, moon bases and Japanese villas. Levels were designed with many routes so that players can climb through air ducts, back doors and sewers to avoid enemies or find hidden secrets. This makes the levels well suited to multiplayer deathmatchs. The secret items also include (light switches to make it easier to see, water fountains and broken hydrants provide some health points) or simply provide a touch of diversion and strippers who Duke tells jokes to and sometimes they open up their clothes.