Styx was Matthew Smith's (of Manic Miner fame) first game, written in 1983.
Here is the game:
http://www.worldofspectrum.org/infoseekid.cgi?id=0004974
Until I Die is a series where I play the game until I die (aka the game over screen). This could mean that the video will be a walkthrough or a complete fail - depending on how well I do!
