MobyGoal achieved! Thanks to all contributors who helped us reach 250 documented ZX81 Games.

Portal

MobyRank MobyScore
Commodore 64
...
...
Macintosh
...
3.5
Apple II
...
3.2

Amiga
Business Model Commercial
Media Type 3.5" Floppy Disk

Apple II
Business Model Commercial
Minimum CPU Class Required Apple II+
Minimum RAM Required 64 KB
Media Type 5.25" Floppy Disk
Video Modes Supported Hi-Res
Input Devices Supported Joystick (Analog), Keyboard
Number of Players Supported 1 Player

Atari ST
There is no technical information on file for the Atari ST release of this game. If you have the tech specs for this game, you can contribute them.

Commodore 64
Media Type Floppy Disk
Input Devices Supported Joystick (Digital), Keyboard

Macintosh
There is no technical information on file for the Macintosh release of this game. If you have the tech specs for this game, you can contribute them.

PC Booter
Business Model Commercial
Minimum CPU Class Required 8088 / 8086
Minimum RAM Required 256 KB
Media Type 5.25" Floppy Disk
Video Modes Supported CGA, Hercules


Technical information contributed by ClydeFrog (10071), -Chris (7365), mo  (1372) and thf (152338)