H.E.R.O.
Helicopter Emergency Rescue Operation

ZX81 Version
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H.E.R.O. / ZX81 version H.E.R.O. / ZX81 version
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Requirements:
48Kbyte Hires-compatible RAM Expansion
The cassette file fits into 16Kbyte, but after decompression it will occupy around 27Kbytes, and additionally requires 6Kbyte bitmap memory, plus an 8Kbyte buffer for horizontally pre-shifted foreground sprites.
Joystick (wired to A12 line in keyboard matrix)
The game can be also played via Cursor or Q,A,O,P,Space keyboard keys, but a joystick will greatly help to control the game.