Master of Orion (1oom)

Game: Master of Orion (DOS, 1993)

1oom: a recreation of the engine of Simtex’s Master of Orion (1993) that aims to reproduce the v1.3 DOS release exactly on modern computers and runs on the original game’s LBX files. It started from 1oom 1.0 by a programmer going by Kilgore Trout Mask Replicant, and MyName (Duzh87_54MSU) restored it from a broken state. It comes with the classic 1993 interface, a proof-of-concept text interface, and tools to view and edit the LBX files, make and dump PBX patches, and convert saved games. The 1.11 releases are the most tested, and the project recommends them until the new version is stable; 1.11.8 made several fixes from patch 1.3a always active, and 1.11.9 (August 12), the latest, fixed a critical bug with queuing a move after an attack, but that branch is no longer developed. Work continues on the “vanilla” version (2.0), closer to the original, which is in testing: RC5 came out on August 27. There are builds for 32- and 64-bit Windows and for MS-DOS, and the code is also mirrored on GitLab and two other sites. The project prohibits the direct use of AI-generated code.

You needThe LBX files from your own copy of Master of Orion, v1.3 for DOS; the Windows and MS-DOS builds are extracted into the game’s folder. Plus Windows or MS-DOS; on Linux you build it from source with SDL 2 and SDL2_mixer.

How it gets to PC

Fan reimplementation

Console

MS-DOS

Original studio

Simtex

Year

1993

Author

Kilgore Trout Mask Replicant / MyName

Stars

112

Last activity

2026-10-29 · 1 day ago

Latest version

v1.11.9 · 2026-08-12

License

GPL-2.0

Language

C