Rockford is back on budget, only this time it's a different label and now you can create your own caves for him to solve!

To anyone who doesn't know, Rockford the Rock Mite's one aim in life is to rush around underground caverns, picking up the diamonds that he finds. Of course, things are complicated by tumbling boulders, exploding fireflies and amoebae which grow into any available space. Sixteen caves are ready and waiting to be conquered, but should you tire of these there's a construction kit included in the package which lets you become a cave-architect, designing all manner of subterranean terrors.

The Boulderdash games were always maddeningly addictive, and the inclusion of a cave editor prolongs the life of this one even further. The graphics aren't spectacular, but they more than serve their purpose and anyway, you'll be busy enough trying to pinch diamonds and stay in one piece to be bothered about what everything looks like. For a title of this calibre, £2.99 is a small price to pay.

C64 owners who don't get their hands on Boulderdash IV ought to have a boulder dropped on them from a great height.

An amazingly good game which, despite its age, remains as challenging and addictive as it was when first released.

The addition of the Construction Kit, makes it well worth the wonga.