sent a short list of levels, Cook created sample artwork on an Amiga 1200. It was met with praise by the other developers, who asked him to "make some more!". The artwork was completed in a 4-month period. After work began on graphics, the popularity of Tyrian rose at Epic MegaGames. Arturo Sinclair from Storm Front Studios joined to create rendered artwork for planets and character faces. The developers wanted a "simple and fun" interface, and changed it at least three times before deciding on a final design. At this point, Tyrian was almost complete; with the "Loudness" sound system, near-completed sound effects, and a marketing plan head by Mark Rein. At this time, Tim Sweeney approached the team and informed them Tyrian was to be published as a full-fledged Epic MegaGames product. It was later released in 1995. The data cubes found in the game's Full Mode contain various references to its parent publishers, including One Must Fall 2097, Jazz Jackrabbit, and Pretzel Pete (Tyrian 2000). The Pretzel Pete Truck and its weapon is a reference to the Pretzel Pete video game. Versions and re-releases Tyrian Version 1.0 of the game was originally released as shareware, consisting of episode 1 of the game. Version 1.1 was the first published registered version, consists of the first three episodes, and includes various bugfixes. The registered version also includes the ship editor, which was later available as separate download. Version 2.0 added Episode 4 (An End to Fate) and several new game modes, like the two-player mode. Version 2.01/2.1 fixed some keyboard bugs and includes the "Christmas mode", triggered by starting the game in December. Tyrian 2000 (3.0) In 1999, Tyrian was re-released as Tyrian 2000, which includes an additional fifth episode and bug fixes. Additional ships include Phoenix II, Storm, Red Dragon, Pretzel Pete Truck (from the Pretzel Pete video game published by XSIV Games). The datacube "TRANSMISSION SOURCE: Epic MegaGames" game and was renamed "TRANSMISSION SOURCE: XSIV Games" with a Pretzel Pete game ad (however, other references to Epic MegaGames titles remain). Although it claims Windows compatibility, this is achieved using a .PIF file, not by building a native Windows application. Game Boy releases World Tree Games developed versions for the Game Boy Color and Game Boy Advance. After the publisher Symmetry Entertainment closed down, the European publisher Stealth Productions, Inc. (Stealth Media Group, Inc.) obtained the publication rights, but