Battlefield 1942: Secret Weapons of WWII is an expansion pack requiring the original release, Battlefield 1942, for play.
Sixteen new vehicles are available, such as the Horton HO 229 "Flying Wing"; the Sturmtiger, a naval gun mounted on a Tiger tank; a Sherman tank with a T-34 rocket launcher; the T95/T28 Super Heavy Tank; the AW-52 US advanced fighter; the Natter rocket plane; a prototype German rocket jetpack; and the Wasserfall anti-air missile.
Seven new weapons -- throwing knives, the Bret light machine guns, the Auto 5 shotgun, the Mauser K98 grenade rifle -- are accessible across eight campaigns, which take players into a V2 research facility, Hitler's hideaway, and the frozen fields of Norway.
A new objective-based combat mode forces players to focus on specific goals, while new enemies can include elite British and German commandos.