Planetary Defense 2012!

Recently I had the opportunity to work with Kostas Nakos, publisher of the "Colleen" Atari 800 emulator for the Android family of devices.  Together, we put together a revised version of the old ANALOG type-in assembly language favorite, "Planetary Defense," which has additional gameplay features and plays on the Android operating system using the touch screen to target and fire missiles!  In addition, the game will submit your scores to an Internet leaderboard using a special device he added to the Atari operating system in the emulator!

Click here for "Colleen" emulator version

Click here to view the Planetary Defense 2012 leaderboard!

But even if you don't have an Android device, you can play the game on any Atari emulator or the original hardware, if you're lucky enough to have a 32K Atari machine.

Planetary Defense

Click here for Atari 800 executable (.ZIP file)

Planetary Defense 2012 plays just like the original -- you are controlling a defensive space station orbiting a planet that is under attack.  Red "planet bombs" will appear from deep space; your job is to shoot them before they hit the planet and detonate, destroying the surface.  But watch out -- if your orbiting station collides with a bomb, it will be destroyed.  You start out with 4 extra stations -- if your orbiting station is destroyed, it will be replaced by one of the spares after a few seconds.


Another threat is the dangerous enemy saucer, which will periodically appear and start shooting projectiles at the planet.  Saucers are very dangerous and can do a lot of damage very quickly, so you must destroy them as soon as you see them.

The game is over when an explosion reaches the planet's core (black spot at the center).

Use the joystick, Koala Pad or touch screen (Android devices only) to control your targeting cursor and fire missiles at the incoming threats.

Because you are orbiting the planet, enemy bombs and saucers may appear on the other side of the planet, with no clear line of fire between your station and the target -- Be careful not to shoot when your planet is in the way, of you will damage it!

You are awarded bonus space stations every 5,000 points and every 8,000 points your planet will be "terraformed" to replace up to 25% of its damaged radius, giving you extra play time.  Good luck!

Programmer's notes: When "Planetary Defense" was written, many of ANALOG Computing's readers had machines with only 16K of memory, so we could only put so many features into the type-in games.  I always wanted some sort of "terraforming" bonus, kind of like your cities getting rebuilt as a bonus in Atari's "Missile Command".  This new version takes advantage of the greater memory of emulators and any existing original systems to provide the enhanced gameplay.

"Planetary Defense" utilizes the "Graphic Violence" assembly-language explosion code I wrote for ANALOG Computing #8 -- I used this same explosion code in my "Buried Buck$" (a.k.a. "Chopper Hunt" by Imagic) game -- You can't say I didn't get some mileage out of that code!

Klanky the Robot® TM & Copyright 1975-2013 Tom Hudson