This is the classic Nintendo game Defender II.

Defend the human population from swarms of attacking aliens. Extremely popular even though it was deemed a flop at a 1981 Chicago arcade machine trade show because of its difficulty. The attract mode for the game was programmed in just five hours. This game from Zipti comes delivered in the MostFun Game Player. Forever have access to great games on your PC--online or offline. Just click and play, and we'll even install the game for you, guaranteed spyware and malware safe!. Find and play unlocked versions of the most popular casual games -- Sweetopia, Spellagories, Poker Pop, Chicktionary, Adventure Elf, Radiux, PengaPop and more. Download and play classic favorites such as Pacman, Space Invaders, Frogger and Tetris. Great versions of Sudoku, Solitaire and other great puzzle games are also included in this unique collection as well. New titles are added weekly - and now includs top titles Cake Mania, Westward, Luxor 2, and Super Granny 3!