Caesar III

Caesar III (Julius)

bvschaik/julius

Julius: an open-source reimplementation of Caesar III that runs with the original game’s files. Its goal is the same game logic with the same look and feel: saves are 100% compatible with the original’s both ways, so it even keeps its gameplay bugs. What changes is the technical side and the interface: a resizable window at any resolution, widescreen included, a windowed mode that works at any color depth, rebindable hotkeys, mouse wheel scrolling in lists and texts, full-city screenshots, optional monthly autosaves, more information in buildings, tooltips, and advisors, the map editor inside the game, and high-quality MP3 music. It runs on Windows, Linux, and macOS, and in the browser, on Android, PS Vita, and Switch too. For gameplay changes there’s Augustus, a fork of Julius. The latest release is 1.8.0 (July 31, 2025), which added Czech, Greek, and Japanese and command-line options for fullscreen and display selection. In another of the project’s repositories, julius-support, linked from its wiki, it offers as optional downloads the game’s official 1.0.1.0 patches in several languages (needed if your copy doesn’t have them), the five MP3 music tracks Sierra once published on its website, and fan translations; the repository itself includes, among its test data, the game’s two empire map files (c3.emp and c32.emp).

You needThe files from your own copy of Caesar III, from GOG, Steam, or the CD, updated to version 1.0.1.0; for the editor, the original editor files as well. Plus Windows, Linux (as an AppImage or Flatpak), or macOS.

⑂ Fork of bvschaik/julius

Caesar III (Augustus)

Keriew/augustus

Augustus: a fork of Julius, the open-source reimplementation of Caesar III, that adds gameplay changes on top of Julius’s interface improvements. Julius keeps the original’s logic and saves; Augustus loads Caesar III and Julius saves, but its own saves only work in Augustus. It adds roadblocks, special market orders, a global labor pool, partial warehouse storage, higher limits, and zoom, and over the years it has added monuments and grand temples, taverns, arenas, new resources (stone, sand, bricks, concrete, and gold), highways, cart depots, custom empires, and scenario events in the map editor, with new graphics under a CC BY-SA 3.0 license. Everything is explained in an English manual, translated into other languages. There are builds for Windows, Linux (AppImage), and macOS, plus Vita, Switch, Android, and the browser. The latest stable release is 4.0.0 (December 28, 2023); development builds, which already include 64-bit Windows and Flatpak, keep coming, with the latest change on October 16. To update the game to 1.0.1.0, the README points to a Julius page that offers, in another of that project’s GitHub repositories, the game’s patches for each language, mostly the official Sierra ones.

You needThe files from your own copy of Caesar III, updated to 1.0.1.0. Augustus can be copied into the game folder or run from a separate one, in which case it asks where the game is; it needs write access to that folder, since saves are stored there. Optionally, it supports the high-quality MP3 files Sierra once published on its website. Plus Windows, Linux, or macOS.