Nightmare City is a series of two Flash animations
created by Clairvoyance. In a nutshell, they feature cats (and one human
girl) fighting to protect a virtual world from an Ax-Crazy
blue cat who wants to trap them in the world forever. The animations
are both music videos and feature no sound apart from the song and very
little dialogue - most of the story is told through the visual.
The first movie, Nightmare City, features The Hero
(an orange, male cat) fighting against the blue cat while protecting
his supposed girlfriend, a pink cat. The two of them conspire to leave
the virtual world together, but the pink cat remains behind at the end
of the video to confront the blue cat, while the orange cat promises to
return soon. A hidden scene accessible through an Easter Egg in the
Flash version shows a boy (who looks vaguely similar to the orange cat)
waking up in some kind of machine, confirming that the city is a virtual
reality. The song used is "Southern Cross" by Japanese band 403 Forbiddena.
second movie, Nightmare City: Catastrophe, picks up where the first
movie left off. We see that the blue cat had survived the pink cat's
attack on him at the end of the first video (or possibly was resurrected
somehow), and has now recruited a team of minions. A small resistance
group battles said minions, while the hero returns to face off and
ultimately defeat the blue cat, though not without cost... The song used
is "Northern Lights" by 403 Forbiddena.