Bonus GamesTyrian is STUFFED with secrets, it's simply amazing. Over a dozen secret levels can be reached, and there's also a secret level which leads to another. There are several levels in which you can get to as much as 3 different secret levels from 3 different places inside the same level!
Also, several (believed to be 3) secret games were added to Tyrian v2.0 (and consequently, Tyrian 2000), the first of which is called Zinglon's Ale. One secret game (see screenshots), which is something of a simultaneous Scorched Earth, was forgotten in the original Tyrian and added to Tyrian V2 (then to Tyrian 2000). To reach it type 'destruct' in the main menu.
Freeware releaseThis game, along with unreleased ports of it to the GameBoy Colour and GameBoy Advance, were re-released as freeware August 17th, 2004, by the author, Jason Emery.
They can be downloaded at http://www.freewebs.com/worldtreegames/ , or through mirrors at its preeminent fanpage: http://members.iinet.net.au/~vannevar/tyrian/downloads.html
LogoTyrian's logo (in the main menu) can be read both the usual way and upside down!
ReferencesMicroSol, the company which tries to take over the world in Tyrian, is arguably a non-very-small pun at Microsoft. A lot of people are still speculating which company/organization MicroSol's rival, Gencore, represent.
Secret MessagesEpic Megagames, the original distributor of Tyrian, has embedded various messages inside the plot. Among them are: A message from Stephan, one of the characters in Epic's One Must Fall 2097 (and also one of the songs in the game is called "One Mustn't Fall"), another which introduces you to other Epic games such as Jazz Jackrabit and also a message which fits the game's plot, hinting at the prospect that "access to subtitle 'Registered Version' might bring further information".
Epic hasn't made any shortcuts in the game, and even bothered to place a message entitled "Mega Soundchair" in order to explain why Tyrian has sounds of explosions in space. Apparently, having learned from the deaths of many young fighters who were terrified by the silence in space, ship manufacturers devised a way to pick up the minute distrubances caused by sound in space and amplify it a thousandfold.
Information also contributed by glidefan and Pseudo_Intellectual
Contributed by Tomer Gabel (4416) on Feb 27, 2000. [revised by : Patrick Bregger (98690)]. -- edit trivia