"On September 2005, a sequel called Duke Nukem Mobile II: Bikini Project was released for the same mobile phones. The game re-uses many sprites of its predecessor and takes place right after its end. The gameplay is the same, with new elements added such as the jetpack, the flamethrower, the pigcop jetcraft and multiple boss characters for some levels." Source: Wikipedia, "Duke Nukem Mobile", available under the CC-BY-SA License.