Interceptor is really improving its standards of software. This is a fairly good example of what it now produces.
The game is based upon guiding your submarine around the caves of Shallic. There are enemy submarines, heat-seeking missiles, mines and other deterrents to stop you completing your mission, which is to visit all the caves before returning to your base.
This game is very hard. No-one can say it is easy or repetitive. Once you have got through a level you automatically re-start on your current level if you get killed.
A nice feature of the game is that you can decide how many lives you wish to begin with, three being the minimum and nine the maximum.
The graphics remind me of the lunar surface in Scramble. They have been implemented very well and seem to be flicker-free as they scroll in all four directions.
For anyone who likes Scramble-type games I recommend this one. Although it is not constant fast action, it is still very good.