1. Forum
  2. Local
  3. ThatC64Guy Games

  • Alien Invaders - ThatC64Guy Game - Game and Program Notes

    From Thatc64guy to All on Mon May 4 16:08:41 2026
    Invaders.prg

    *Game Notes*

    London is in peril! An Interplanetary Battle Fleet from Mars - whose inhabitants are infuriated by our claims that their planet is dead - has attacked. The Ministry of Defence is asleep, so you have to defend the city with just one missle launcher.

    You can move the launcher to the left using capital Z and to the right using X. Press F when you are ready to fire.

    The aliens descend cautiously at first, but be on your guard. If you let a single ship through, London will be devastated.

    During the game you score points for each invader you hit - more points for a ship high in the sky than for one close to the ground. If you want to make the game more difficult, try replacing (N+2) in line 200 by (N+1) or reducing the 4 in line 290 to 3,2 or 1.