You've already got your glorious ZX81 and are all proud and refreshing your BASIC skills. Then again, it would be nice to try some classic and professionally produced games like Mazogs and 3D Monster Maze, wouldn't it? Well, I'm afraid you'll need some extra RAM in the form of a wobbly ram-pack for that. Go get a boxed Sinclair ZX81 16k RAM pack @ eBay and play away. Seller ships only within the UK.