OpenRA creator footage still showing its Red Alert ruleset. Other included rulesets have different units and settings.
Image credits ↗Classic Westwood real-time strategy games reimagined in a modern native engine.
Free assets availableDownload
Total Annihilation
A replacement engine for Total Annihilation on modern desktop systems.
SetupYour game files requiredOriginal-game image
Credits
Total Annihilation gameplay reference; not a capture of the linked project.
Total Annihilation game imagery remains copyright its respective rights holders. Publisher-supplied screenshot from the linked official Steam store gallery.
Source & attribution ↗View image ↗About this version
The README supports the original Total Annihilation data with the 3.1 update. Kingdoms is on the roadmap and is not counted as supported.
- Project
- Open Annihilation
- Original game
- Total Annihilation
War across land, sea and air
Total Annihilation is a real-time strategy game about the long war between the Arm and Core. Its armies mix walking robots, vehicles, aircraft, ships and fixed defenses on three-dimensional terrain. Different maps make those forces useful in different combinations: a water-heavy battlefield asks different questions from open land covered by long-range weapons.
The original campaigns introduce larger arsenals through missions, while skirmishes and multiplayer emphasize building and directing an army. That is background on the retail game. Open Annihilation’s own single-player roadmap and supported data requirements determine how much of that design is currently available here.
A modern home for Total Annihilation data
Open Annihilation is an engine for the original Total Annihilation, with current desktop builds and additional platform-specific installation routes. It uses your own installed game data with the 3.1 update. Total Annihilation: Kingdoms is a roadmap item, so owning Kingdoms does not provide a substitute set of supported files.
The project’s scope also needs a distinction within Total Annihilation itself: completing the rest of the single-player game remains on its roadmap. Network play, mods and useful tools can be documented without turning that ongoing work into a blanket campaign-completion claim.
Explore mods and revisit a battle
The in-game Library manages mods, map packs and languages, including updates and rollbacks. Mods describe changes to the standard game through a profile that the engine applies. This offers a practical way to explore a different ruleset while keeping track of which mod and maps a session uses.
The Demo Recorder provides a way to revisit supported recorded games, but a replay still depends on its environment. The viewer requires the supported recorder format, an installed map and the same units, including mod content where applicable. A recording is not a self-contained bundle of the game it depicts.
Full data, demo data and platform choices
The README documents a free original demo-data route as well as the full game. Follow that section’s installer verification and extraction steps if exploring the engine before supplying a full installation. Neither route includes game content inside the engine download.
Desktop installation guides cover macOS, Windows and Linux. iPhone and iPad have a separate build-on-your-Mac process, while the Steam Deck package is labeled experimental. Open the engine settings with Command-comma on macOS or Control-comma elsewhere; the in-game OA menu also leads to its settings and Library. Choose the guide for the actual device rather than assuming every platform has the same package or setup.
Before you play
Do I need the original game files?
Your own Total Annihilation installation with update 3.1.
Creator-reported · Project guideHow do I get started?
Follow the current original-project release and setup guide; supply the supported game files when requested.
Creator-reported · Project guide
Dune Dynasty creator screenshot; the gameplay panel is cropped from the project’s four-panel showcase.
Image credits ↗
Weltendämmerung creator demonstration, gameplay frame 4 of the supplied GIF; served as a static still.
Image credits ↗
Generals Zero Hour publisher screenshot. Original-game reference; not a GeneralsX capture.
Image credits ↗Generals Zero Hour in a WebGPU browser, using your own installed game files.
Original files requiredPlay