The role of this file changed slightly with the release of the Anno 1404: History Edition
If you are still struggling with the eng0.rda file, consider purchasing the on Ubisoft Connect or Steam. This version natively supports English audio and text without manual file swaps. However, be aware that some veteran players prefer the original Venice executable because certain mods (like I.A.A.M. (Ian’s Anno 1404 Mod) or the Unofficial Patch) do not work perfectly with the History Edition.
The updated Anno 1404 History Edition on Ubisoft removed separate launch points for the base game and the expansion. It features an entirely streamlined modern file directory. In this version, patch accumulation structures are eliminated. All language elements, text string tables, and structural updates are integrated squarely back into a singular, main system file. Advanced Modding: Using the RDA Explorer
Save the file and set it to "Read-Only" (right-click > Properties) to prevent the game from overwriting it.
, it is critical to use the "Open" method rather than "Open - READ ONLY" to prevent the game from disabling achievements due to "modified" status. Key Version Differences
The Anno engine bundles its code, multimedia, and text parameters inside highly compressed .rda packages rather than loose directories. In a standard installation, the game loads data sequentially from Data0.rda to Data5.rda .