Mars3D - Source port of obscure 1997 Taiwanese Doom clone Mars: The Ultimate Fighter - ''Kissu my ass!''


Those long posts don't cover that red neck boy
Back in the late 90's, Doom clones were almost a genre of themselves. Countless shooters with similar looking visuals and themes were released, one more forgotten than the other.

Even in China, Doom's influence was not far away. Developer Engine Technology LTD released Mars: The Ultimate Fighter in 1997. It later would power two more games - 3D Hero from 1997 and Tao from 1998. All games focused on sci-fi or Chinese epic sagas, told with stolen sound effects from Quake and a huge difficulty spike.

From The 2019 re-release:

The 90s were the peak of 3D-shooters. Hits like "Doom" or "Duke Nukem 3D" dominated the genre and the PC market. Many Companies wanted a piece of the cake and started publishing their own titles. In 1997, a software company named"Engine Technology CO. LTD" based in Taiwan/China, developed their 3D-shooter named "終極戰士 / The Ultimate Fighter" also known as "MARS or MARS 3D".

This one was programmed in their own engine which was developed using reverse engineering the known top titles at the time. Program code had to be cloaked and even textures were taken from other games and simply modified at most. The game didn't see commercial success in it's home country (some rumors say it was never officially sold) and never found a way to the western world.


In 2013, a Chinese user called "Newclicker" uploaded an ISO of the original CD-ROM and another user, "Player Lin", uploaded a bad English transcript in textform on YouTube.

2018, some retro fans sacrificed their time to translate the whole game into English, so that it was possible to play a full English copy under MS-DOS.

Developer Jim Valavanis has been working on a Windows port of the game, utilizing the DelphiDoom source base. Called Mars3D/GLMars3D, it features both a software and a OpenGL accelerated version of the game.

  • High screen resolutions.
  • True color software rendering.
  • OpenGL rendering.
  • Uncapped framerate.
  • Textured automap.
  • Dynamic lights.
  • Flac & ogg sound effects.
  • MOD, S3M, IT & XM track music support.
  • Screenshots.
  • In game menu to configure gameplay, key bindings & screen resolution.
  • Use Doom game editing utilities to create custom content.
  • Advanced scripting (PascalScript).
  • New enemies and pickups, using the original game resources.
The game uses the Doom format for maps, sprites, textures and flats inside a file container named MARS.MAD, which is very similar to WAD. Sounds, music and palettes are located outside the container. In fact the original DOS executable can load WAD files as well as MAD files. The most line and sector specials are the same as Doom. There are a few additions to the engine, compared to Doom:
  • Full motion video
  • Underwater portals
  • Simple dialogs (like Strife, but ... very simple)
  • Briefing screens
  • Fog sectors


  • The 2019 English translated ISO can be downloaded for free, here.
  • The source port can be found here.
Last edited:
Top Bottom