Defender
            Platforms:
                    Apple II, 
                    Arcade, 
                    Atari 2600, 
                    Atari 5200, 
                    Atari 8-bit, 
                    ColecoVision, 
                    Commodore 64, 
                    Commodore VIC-20, 
                    IBM PC/Compatibles, 
                    Intellivision, 
                    TI-99/4A
        
		Apple II
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Minimum System Supported: | Apple II | 
| Minimum RAM Required: | 48 KB | 
| Display Hardware Supported: | Hi-Res | 
| Media: | 5.25" Disk | 
| Input Devices: | Joystick , Keyboard | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Arcade
	
	
		
		
		
		
			
	Monitor
	
                
                        
			
	Sound
	
                
                        
			
			
	Hardware
	
                
                        
			
	Gameplay Info
	
                
                        
			
        
	
| Monitor Orientation: | Horizontal | 
| Monitor Type: | Raster | 
| Monitor Capabilities: | Color | 
| Video Resolution: | 292 x 240 @ 60.096154 Hz | 
| Sound Capabilities: | Mono | 
| Sound CPU: | Motorola MC6808 @ 3.579545 MHz (x1) | 
| Sound Hardware: | DAC (x1) | 
| Arcade System Board: | Williams 6809 REV.1 | 
| CPU: | Motorola MC6809E @ 1.0 MHz (x1) | 
| Cabinet Type: | Cocktail Table , Upright/Standard | 
| Number of Players Supported: | 1-2 Players | 
| Control Panel Layout: | Single Player | 
| Multiplayer Gameplay: | Alternating | 
| Controls (per player): | Button (x5) , Joystick (x1) | 
		Atari 2600
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Media: | Cartridge | 
| Input Devices: | Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Atari 5200
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Input Devices: | Atari 5200 Joystick , Trak-Ball Controller | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Atari 8-bit
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Minimum RAM Required: | 16 KB | 
| Media: | Cartridge | 
| Input Devices: | Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		ColecoVision
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Input Devices: | Standard ColecoVision Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Commodore 64
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                
                        
			
			
	Gameplay Info
	
                
                        
			
            Video Resolutions
        
            
    
	
| Media: | Cartridge | 
| Input Devices: | Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Commodore VIC-20
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| VIC-20 Memory Expansion Required: | Unexpanded | 
| Media: | Cartridge | 
| Input Devices: | Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		IBM PC/Compatibles
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Minimum CPU required: | 8088 / 8086 | 
| Minimum RAM Required: | 128 KB | 
| Minimum DOS version: | Bootable Disk | 
| Display Hardware Supported: | CGA   | 
| Media: | 5.25" Disk | 
| Sound Hardware Supported: | PC Internal Speaker | 
| Input Devices: | Joystick , Keyboard | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
		Intellivision
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Media: | Cartridge | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1 Player | 
		TI-99/4A
	
	
		
		
		
		
			
			
			
	Technical Info
	
                
                        
			
			
	Gameplay Info
	
                
                        
			
        
	
| Minimum System Supported: | TI-99/4A | 
| Media: | Cartridge | 
| Input Devices: | Joystick | 
| Business Model: | Commercial | 
| Number of Players Supported: | 1-2 Players | 
| Multiplayer Gameplay: | Alternating | 
