Since there is no native Android port, the most common APKs found online are actually package files containing the original PC game running inside a Windows emulator wrapper (such as WinEx or similar emulation software). These are essentially the PC files pre-configured to run on Android hardware.
: The game uses the Prism3D engine to render 3D environments and characters, but limits movement to a 2D plane for a classic side-scroller feel.
: A 2D side-scroller (distinct from Manhattan Project) was released for early mobile phones and briefly appeared on the Android Market.
Searches for this exact phrase frequently lead to sites that serve duke-nukem-mp-mod.apk (non-existent) or redirect to survey scams.