Space Irrvaders

A while ago we had a “make a Space Invaders clone in a weekend” challenge on the Irrlicht forums. Having written lots of arcade games over the years I decided to try something different: an Invaders clone with a cylindrical coordinate system, mapped onto a circle.

The result was a fun game:

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As usual it contains no sounds, also due to its hurried nature the menu design is pretty awful. Maybe I should add sounds and get it added to Linux distros, and make the source code something to be proud of, but no promises here!

You can grab a Windows binary if you just want to play it, which will be a lot more fun that reading the source.

Sprites

It’s always fun to make sprites for this sort of thing.

The bases are made out of a triangle and a square, with 4 levels of strength, and power-ups come in 16 flavors:

2x4 grid	4x4 grid

The invaders themselves have two animation frames, with two types of alien, and when you get a power-down that makes them tougher, they get swapped out for the “beefcake mode” version:

Eats space dust	Eats protien powder

The font is a bitmap tribute to the ZX Spectrum, and has the lives sprite as one of the characters:

Which looks pretty neat in-game:

Easter chestnuts

And if you look closely, the UFO has a 3 breasted alien inside. Not that you can tell from the scaled down version, but we had a laugh about it on IRC:

Making of Pics