Gridrunner came out on the Commodore 64 in 1983, making it a fairly early shooter for the system. Gameplay is basically the same as the VIC-20 original, but with slightly better graphics and a few more clock cycles to play with.
There are twenty levels in total to play through, each with more enemies and hazards than the last.
Gridrunner was released as a cartridge in North America by Human Engineered Software (aka HES) and the cover art is nice on that release too.
An improvement over the VIC-20 original, but only really because the increase in speed makes the controls more responsive. But otherwise – in terms of graphics and gameplay – the C64 and VIC-20 versions of Gridrunner are pretty much identical.
More: Gridrunner on Wikipedia