This is a small weekend homage to the classic c64 shoot-em-up "Delta".

• Read more

• POWER UPS

  • speed
  • fire rate
  • fire multiple
  • fire up/down/back
  • shield

• MORE ALIEN VARIETY:

  • rotate around a queen alien
  • pillars with gaps to fly through
  • boss aliens
  • split/multiple waves (e.g. 2 or more independent waves at same time)
  • ddx/ddy accelerating (hyperbolic and elliptical motion)
  • give aliens customizable health so they might take multiple shots before dying
  • give aliens customizable shot rate

• MORE GRAPHICS

  • alien graphics
  • bullet graphics
  • rock/border graphics
  • title screen graphics

• CLEANUP and MISC

  • clean up the hideous N^2 collision detection code
  • use a little PUB/SUB event handling for simpler code
  • "are you sure" confirmation on quit
  • high scores
  • performance (avoid garbage, optimize rendering)

The game is 100% client side javascript and css. It should run when served up by any web server.

Any changes to the following files will be reflected immediately on refresh of the browser

• js/delta.js
• css/delta.css
• images/
• levels/

However, if you modify the js/game/ or js/vendor/ javascript files, the unified versions need to be regenerated:

js/vendor.js        # the unified 3rd party vendor scripts (fpsmeter, state-machine, etc)
js/game.js          # the unified general purpose game engine

If you have the Ruby language available, Rake tasks can be used to auto generate these unified files:

rake assets:create   # re-create unified javascript/css asset files on demand
rake assets:server   # run a simple rack server that automatically regenerates the unified files when the underlying source is modified

All sounds effects are CC licensed from freesound.org

• shoot
• explode

Music is (respectfully) borrowed from Rob Hubbard's original because it's ABSOLUTELY FANTASTIC!

• High Voltage SID Collection

All graphics are (respectfully) ripped from original R-Type arcade games by

• http://www.retrogamezone.co.uk/rtype.htm

MIT license.