Two ambitious community modding projects have delivered substantial unofficial upgrades to Medieval II: Total War and Rome: Total War, bringing 64-bit architecture, AI performance improvements, and a range of modern quality-of-life features to two of the most beloved entries in the Total War series.
The M2EX project, in development since March 2026, replaces Medieval II’s executable with a 64-bit version, eliminating the memory limitations and stability issues that have affected the game on modern hardware. The most immediately noticeable improvement is AI turn processing speed, which now completes in seconds rather than the extended pauses that have long tested player patience in late-game campaigns. The upgrade also removes engine caps on the number of factions, regions, cultures, and religions, opening the door for larger and more ambitious mod projects built on top of M2EX. Additional technical improvements include native Steam Deck support, true borderless windowed mode, elimination of Alt+Tab crashes, and significantly reduced loading times for both battle and campaign.
Bug fixes address problems that have persisted since the original 2006 release, including two-handed weapon and pike unit behaviour that now functions as originally intended, and arquebusier and crossbowman line-of-fire issues caused by obstacles. Quality-of-life additions drawn from newer Total War titles include formation rotation, an extended camera zoom range, manual heir assignment in the family tree, enemy kill counters, movement range indicators, campaign map overlays for public order and settlement population, and the restoration of the classic settlement walkthrough view that allows players to explore their cities on foot.
The REX project takes the same 64-bit approach to the original Rome: Total War, distinct from the 2021 remastered edition. The upgrade pushes the game to up to 280 frames per second even during large battles. A reworked battle AI addresses many of the exploits present in the original. Visual improvements cover the campaign map and minimap. Unit card positioning is now freely customisable, and accurate movement range previews and real-time kill counters have been added.
Both projects arrive at a relevant moment given Creative Assembly’s ongoing work on Total War: Medieval III, which confirmed during the April Show and Tell stream that it is rebuilding many classic features from scratch in the new engine. For players unable to wait, M2EX and REX represent the most complete versions of their respective games currently available.
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