In an alternate version of the 21st century, the Germans have taken over the world after winning World War II. The player is a scientist in the future and, with the help of a time machine, they travel back to the war to alter the outcome and find out how the Nazis managed to win it in the first place.
In this first-person shooter, the player encounters Hitler's SS troops and Wehrmacht infantry equipped with pistols, machine guns, bazookas, and more eccentric weapons in locations such as castles and ruined cities. Using the time machine, players also travel back to see the impact of their actions, such as with modern scenery and weapons. Vehicles, planes, and submarines are active game elements in a 3D world powered by Calaris' IC engine.
The game has lots of explicit violence and includes Nazi symbols, and German voice acting.
The full version of the game was given on Gamelive PC #20 (July 2002), a Spaniard magazine.
Sebastian Zielinski, credited as the lead programmer, was not officially involved in Mortyr. He is one of the founders of Calaris Studios, whose IC Engine was licensed for the game.
The official demo version is banned in Germany because of Nazi symbols.
All references to Nazis were removed in the German version; the player now fights against a sect named "Chronotec". A detailed list of changes can be found on schnittberichte.com (German).
A stained glass windows in a 1944 Berlin cathedral bears an image of a woman in a bikini. The same woman in the same pose is also on a poster in a disco in the year 2093. Considering as how all the propaganda posters in 2093 appear to be of the production team, does this mean that the bikini woman is the wife/girlfriend of one of the creators or is this just another aspect of the time travel "story"?
Despite very poor reviews abroad, the game was almost universally acclaimed by Polish press, and ads ran for the game called it "a hit on a global scale!" and "the most important event of the year".