Commodore VIC-20 - GORF: Level overview intro 

GORF is an arcade video game released in 1981 (and on cartridge in 1982) for the VIC-20, it was as advertised as an acronym for "Galactic Orbiting Robot Force"
This video shows the four levels in this version, which run automatically in demo mode when switching the Commodore on with the cartridge inserted:
1 Astro Battles
2 Laser Attack
3 Space Warp
4 Flag Ship
This video was recorded from a working VIC-20 in the UK - not an emulator.
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