v1.0 Community Edition Release

• Integrated sprite multiplexer (by Cadaver), to increase the number of sprites on screen
• Adapted new star field routine (by Jay Aldred) to reduce CPU usage
• Integrated exclusive SID music (by Richard Bayliss) based on the original game theme
• Added the Extreme skill level to match the original game
• Implemented new menu/hangar screens with joystick support (instead of keyboard)
• Changed speed of player ship, and added small intertia
• Added horizontal movement for Alien Shooters (similar to Android version)
• Besides the regular enemies in some waves a Destroyer will cross the screen and launch a missile towards the player
• Missiles can be collected the same way as bullets, however are launched using the Joystick up
• There are two types of missiles:
  • Regular missiles: Can destroy aliens but also asteroids with a single shot. The hit score is 15 for missiles.
  • "Full ammo" missiles: These will be launched around 20% of the times by the destroyer. It gives unlimited bullets for two waves.
• Implemented asteroid field with animation (both X & Y movement)
• 3 bullet shots are needed to destroy an asteroid but only 1 missile
• Added new menu screen with information about missiles, asteroids and the medal panel
• Updated credits screen to show additional code developers
• Implemented Stages
  • 7 stages per skill level with enemy waves randomly selected from 18 available
  • An asteroid field closes each stage. There are 2 options randomly selected.
• Added medal award on Game Over screen when player finishes every skill level
• The same way as the original game, 1000 points on each skill level are needed to unlock the other player ship models
• Removed usage of kernal keyboard routines, that caused slow down on the game with any key press
• Changed in-game sound switches to a single "mute" option
• Added "Paused Game" message on screen
• Aliens speed adjusted when PAL computer is detected
• Adjusted collision area for player ship, and now the Shield collision is a little wider
• Reorganized memory to support new sprites and screens
• Added move left and right animation frames to all player ship models
• Added animation frames to probe, shooter and asteroid sprites
• Added new Orb Probes that swings horizontally as it moves down the screen
• Added Mine Probes than needs 2 hits to be destroyed (or a missile)
• Added new Sonar bomber that passes 3 times and launches a sonic bomb that can only be bounced by player shield
• Bombs launched by Destroyer and Sonar now follows the player ship, as in original game
• Bombs launched by player can be guided by the ship position
• Reduced player ship hitbox for sprites and bullets when shield is down
• Shield recovery speed is now faster than consumption (similar to original game)
• Player ship fly from below the screen on start of stage
• Multiple explosions when player dies
• Implemented warp star speed on end of each stage
• Added support to record several hi-scores, one per skill level
• Added new screen with all enemies sprites and ammo types information
• Moved the splash bitmap screen from the main prg to the loader menu
• Several optimizations and bug fixes

DirArt on this release by Logiker
Check the DX edition of the game to get more features and support this project!

v0.3 Final Beta - SID Music and Info Screen

• Updated Splash bitmap to show 3 of the ship models
• Added SID music support (using Dion Olsthoorn library)
• Added SID music during game play (Scout by Jeroen Tel)
• Implemented support for NTSC on PAL music playback
• Implemented new screen with Score Points and Game Control information
• Implemented Game Pause (using space bar)
• Added new Hangar title using sprites
• Implemented support to select ship model with joystick on Hangar
• Implemented shield activation (with joystick) on Hangar
• Added option to disable music on Hangar
• Added option to disable sfx and music during the game
• Moved difficulty level selection to Hangar and added to saved data
• Reduced number of stars to improve game performance
• Improved performance of shield gauge display routing
• Fixed shooter aliens "double round" issue on Hard mode at the end of waves
• Reorganized game memory map (see repo Wiki)

DirArt on this release by Logiker

v0.2.1 Beta - Freeze Hotfix

• Fixed bug #1 - Hangar save option (F7) freezing the game
• Fixed bug #2 - Key combination shift+C= scrambling the screen
• Compressed prg with exomizer to speedup load time

v0.2 Beta - Hangar Screen and Skill Levels

• Added 3 Difficulty Levels (Easy, Normal, Hard)
• Added 4 new ship sprites (based on the original game)
• Implemented Hangar Screen to select ship model, ship and shield colors
• Added option to save high scores and hangar settings to disk
• Added Game Over screen with mission statistics
• Added more aliens wave configurations

v0.1 Beta - Initial Release

Implemented the basic functionality of the original game with multiple alien waves.