Vyrus is set in the immediate future of its creation year, 1991. “The year is 1994. Hackers have invented the ultimate computer virus, a living, organic virus that survives even when the power is turned off.” The viruses manifest themselves in the computer as monsters and can only be destroyed with a Virus Killer Blast spaceship.

Vyrus was a shoot'em up that was released in February 1991 on Amiga Fun (UK) issue 4 and at the same time, 1991-02-15, on Amiga Fun (De) issue 3/91. This was the time when LINEL’s Markus Grimmer worked with Computec (CT) on establishing Diskmags in the UK in a similar format as the successful format in Germany. Vyrus was developed by Stuart Johnson (Code) and Miachael Tschögl (Graphics and Audio). Both developers worked on several projects for LINEL at that time. The German diskmag was sold for DM 19.90 while the UK diskmag of Amiga Fun was sold for £ 4.90. The AMIGA FUN and AMIGO disk magazines were published by CT-Verlag (Computec), with the first issues of AMIGA FUN in Germany, Switzerland and Austria appearing in January 1990. In the UK, Amiga Fun was a short-lived games magazine launched in November 1990 by MC Publications and canceled only a year later. The German diskmag managed to survive for some more years.

“Vyrus is a shoot'em up that suffers from the same gameplay problems that marr Blastar (1984). Technically, it's quite alright and even somewhat playable, but manoeuvring is difficult and since the playfield is so small, you often crash into enemies that suddenly appear at the edge of the screen.” A comment from user ReTroVIrus (2007) on the Lemonamiga entry for Vyrus (1991).

Playfully inspired by Cosmic Pirate (1989), it is an eight-way shooter. The scrolling text that appears at the bottom of the screen during the action echoes the scrolling texts of the crackers of that time. However, it is difficult to read. It tells of a new type of computer virus that must be fought. Stylistically, it's a great idea: you fly through the inside of your own computer and deal with invaders who really have no business being on the circuit boards and chips. In a Retro-Review Mr. Creosote describes this and writes: “How cool and motivating is that! The beautiful soundtrack, which you won't get tired of even after an hour of playing despite the continuous loop, does the rest.” The game only has two levels, but it seems impossible to reach the second one. This may be because the spaceship is no longer in the middle of the screen, but has been shifted to one edge. Mr. Creosote states and critices that the controls are one-dimensional: the spaceship flies forward automatically. The player controls the direction by rotating around the centre of the screen. “This restriction on freedom of movement, combined with the need to stay close to the edge of the screen and the lack of a radar, makes it practically impossible to dodge the enemy squadrons that suddenly appear. Every collision eats away at your energy. A little bit here, then a little bit there. It melts like ice cream in the sun! So even three lives aren't worth much.” (Goodolddays 11.10. 2025, https://www.goodolddays.net/de/game/Vyrus/)