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