be discovered, although in some advanced episodes - notably "OAP" in Life of Repton, "Oceans" in Around the World and "Future" in Repton Thru Time - some objects and enemies are invisible or appear very similar to desirable or innocuous objects.) Repton: The Lost Realms In 1988, teenage programmer Paras Sidapara submitted a game he called Repton 4 to Superior Software. As Superior were already working on Repton Infinity, it was not published, and was forgotten until 2008, when a copy was rediscovered. The game was re-programmed by Sarah Walker and rechristened The Lost Realms, to avoid confusion with the Repton 4 game included in Repton Infinity. It was launched in November 2010 by Retro Software, with Superior's permission. The game is similar in style to Repton 3, retaining the structure of separate, password-protected levels and the map and graphics editors. New features include balloons, "absorbency" doors (which can be opened when an "absorbalene" pill is collected, but each pill only allows a certain number of doors to be opened) and ice crystals (which, when collected, freeze any monsters on the level). Music The music for Repton is Black and White Rag, by George Botsford, which has been well known in Britain at least since its 1969 popularization as the theme tune to the long-running TV snooker programme Pot Black. The Scott Joplin intermezzo The Chrysanthemum is the music for Repton 2. The music for Repton 3 was composed specifically for the game by Paul Hughes and Peter Clarke. Repton Infinity features in-game music, on pressing the 'T' key, although it does not play at the same time as the sound effects during the game, and is turned off by default. It was composed especially for the game by David Acton. Repton ports, clones and derivatives Ports The Repton games were closely associated with the BBC Micro and Acorn Electron but versions were released for other 8-bit computers. Superior Software had planned to launch Repton 3 with ports for the Commodore 64 and Amstrad CPC (as shown in pre-release press advertisements). The Amstrad version was never released but the C64 port did arrive in 1987. Ports of the first 3 Repton games were later developed for the ZX Spectrum and Repton and Repton 2 were released together as Repton Mania in 1989 (published using the joint Superior/Alligata name). This was not a success and the Spectrum Repton 3 was not