- 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!