Repton is a multi-level arcade adventure set in an underground cave. The object is to complete all twelve levels without losing any lives. If you manage to do so, then you are elligible to win the £100 prize for the first to achieve this goal.
The game involves solving a set of problems so that you can collect all of the diamonds within a set time. To hamper you, there are one or more reptiles which, when hatched, chase you to an almost certain death.
The screen displays 1/16th of the playing area of any level. You can move in any one of four directions, and the game features an excellent 4-way scroll. The problems set by this game are quite challenging and can be very tricky to puzzle out. A good feature of this game allows you to start on any level, once you have the appropriate password, obtained by completing the previous level.
To enter the competition, you must get from level 1 to level 12 in one sitting, and with only four lives, much harder than completing each level separately. Overall, Repton is well worth buying, with the added chance of winning £100.