the 11th level onward, at various intervals throughout the games, "Magic Tokens" blocked crucial parts and passageways of the landscapes, mostly rendering progress impossible. These stones could only be removed by entering a code. The Oxyd Book was sold separately for $39, with code tables matching the information given on the Magic Stone. This form of software protection used the book as a dongle or code wheel; however, unlike other games which use the code book protection approach, the game itself was free. Reception Computer Gaming World in April 1993 called Oxyd "My favorite new shareware title ... an exceptional offering, guaranteed to provide numerous hours of enjoyment". The magazine in April 1994 said that Oxyd Magnum "will quickly pull players deeper and deeper into its 100 devilish mazes". Computer Gaming World in May 1994 said that it "is a game with very few flaws. The graphics are clean, and the mouse control is crisp", and praised the small size. The magazine concluded that "Oxyd Magnum is a top notch puzzle game that will keep players up to the early hours of the morning attempting to solve 'just one more level. Legacy Oxyd spawned a number of sequels: Oxyd Magnum, Oxyd Extra, and (also known as Oxyd 2). Additionally, Oxyd itself was a sequel to a lesser-known game, called Esprit. In summer 2019, Dongleware announced a completely new Oxyd release and a port of the classic version to the Nintendo Switch console. In March 2021, the Steam store page for the game was removed. Around 2020, Oxydgames twitter account was suspended. Only the YouTube channel and website remain. The current status of the new release is unknown, as such it is assumed that development has been suspended. Enigma is an Open source fangame with over a thousand different landscapes that can also read the original Oxyd level packs (they are not included for copyright reasons). Also the included "Dejavu" level packs contain levels with similar ideas to the original levels. Mad Data, with the permission of Dongleware, has produced an official freeware game with the name "Oxyd extra v2.0". References External links Oxyd at Hall of Light Amiga database www.dongleware.com www.oxyd-game.com archived from the original on June 15, 2006 Amiga games Atari ST games DOS games Classic Mac OS games Puzzle video games Video games developed in Germany 1990 video games Marble games