This is an earlier version of Xevious, but is still quite playable.
The most noticeable difference is that the display kernel is slightly
glitchy, causing the screen to jump now and then. There also appear
to be little yellow dashes the randomly appear around the screen. This
version is also missing almost all sound.
Differences
There are no sounds except for a quiet shooting sound
The display kernel is glitchy and jumps often
Little yellow dashes appear on the screen
The background is slightly different
Notice the yellow dash towards the top of
the screen?
That black color is a start up glitch
The gameplay seems to be about the same
Due to flicker you cannot see the other part
of your ship