corsixth.com

What is CorsixTH?

CorsixTH is an open-source re-implementation of the engine behind Theme Hospital, the 1997 hospital-management sim. It is not a remake or a new game: it runs the original game's data files, so you still need a copy of Theme Hospital (or its demo) to play. The project's stated goal is to rebuild the engine in open source code so that extensions and improvements to the original game become possible.

In practice, that means you install CorsixTH, point it at your existing Theme Hospital installation, and play something that behaves like the original while gaining modern conveniences — the kind of things a re-implementation typically adds, such as higher resolutions, better support for current operating systems, and quality-of-life fixes the 1997 release never had.

Who it's for

• Returning players who own Theme Hospital and want it to run cleanly on a modern machine without emulation or compatibility patches.
• Tinkerers and modders interested in an open codebase they can extend, since that is the project's explicit long-term purpose.
• Not for people who don't own the original game and just want a free hospital sim — the data files are required.

What to check before diving in

Look at the release notes for the version you download, since the project ships frequent releases and release candidates. If you want to follow where it's heading, the development blog covers features in progress.

A practical first step: confirm you have a legitimate Theme Hospital copy (the project points to GOG.com as one source), then download the current CorsixTH release from CorsixTH and read its release notes before installing.

Do I need the original Theme Hospital game to play CorsixTH?

Yes. CorsixTH is a re-implementation of the Theme Hospital engine, not a standalone game. It loads the original game's data files, so you need a copy of Theme Hospital to play it. The project page notes you can use either the demo or the full game, with the full version available from storefronts such as GOG.com.

That distinction matters in practice: the CorsixTH download gives you the engine, interface and fixes, while the original data supplies the graphics, sounds, levels and text. If you already own Theme Hospital on disc or from a digital store, you can point CorsixTH at that installation rather than buying anything new.

What you actually need

• A copy of Theme Hospital, either the demo or the full game.
• The CorsixTH release for your operating system.
• Enough disk space for both, since CorsixTH does not replace your original files.

Why the project works this way

Re-implementing the engine in open source code avoids redistributing the original assets, which remain copyrighted. Once the engine is rebuilt, the project can serve as a base for extensions and improvements to the original game. That is why the download page and the game data are separate steps.

A quick decision guide

Next step: check whether your existing Theme Hospital copy is already installed, then follow the CorsixTH setup instructions for your platform. If you do not own it, decide between the demo for a quick test and the full game for the complete experience.

How do I install and set up CorsixTH with my copy of Theme Hospital?

Install CorsixTH by installing the CorsixTH program first, then pointing it at a copy of Theme Hospital that you already own. CorsixTH is a re-implementation of the Theme Hospital engine that loads the original game's data files, so the game assets come from your existing copy rather than from CorsixTH itself. CorsixTH

What you need

• The CorsixTH program, from its official site.
• A copy of Theme Hospital: either the demo or the full game. The project's page names GOG.com as one place the full game is available. CorsixTH
• Enough disk space for both, and a machine that can run the current release.

Typical setup flow

1. Install Theme Hospital (or place the demo files somewhere you can find them).
2. Install CorsixTH using the download for your operating system.
3. On first launch, CorsixTH will ask for the location of the Theme Hospital data. Browse to the folder containing the original game files, not the CorsixTH folder.
4. Let it verify the files; if it reports missing or mismatched data, re-check the folder you selected.
5. Set your display and audio options, then start a game.

Practical points

• Keep the original Theme Hospital installation intact. CorsixTH reads from it; it does not replace it.
• If the game was installed through a store client, you may need to locate the actual install directory rather than the shortcut.
• CorsixTH is actively developed, with releases and a development blog on the official site, so check the current version before reporting a problem. CorsixTH

Next step

If setup fails, the quickest check is to confirm the folder you selected contains the original Theme Hospital data files, then compare your CorsixTH version against the latest listed release. For anything else, the project's own documentation and community channels are the right place to ask, since they know the current file requirements.

What new features or improvements does CorsixTH add to the original Theme Hospital?

CorsixTH re-implements Theme Hospital's engine in open source code while loading the original game's data files. That approach means its additions are engine-level and quality-of-life changes rather than a new game: the hospital simulation, rooms, staff and illnesses you remember still come from the original data.

Concrete improvements the project describes include:

• Modern platform support: an open-source engine can run on systems the 1997 release never targeted, and it can be updated when those systems change.
• A base for extensions: once the original engine is largely re-implemented, the codebase is intended as a foundation for further improvements, not just a faithful copy.
• Accessibility work: the development blog includes an article titled "A More Accessible CorsixTH", indicating ongoing attention to making the game easier to use for more players.
• Continued maintenance: releases and release candidates appear regularly, with the latest listed as CorsixTH 0.70.1, so fixes and refinements keep arriving.

What you still need: CorsixTH does not include the game itself. You must supply either the Theme Hospital demo or the full game data files, which the page notes are available from storefronts such as GOG.com.

Practical next step: if you already own Theme Hospital, download the current CorsixTH release, point it at your installed game data, and compare a single hospital run against the original. That is the fastest way to judge whether the engine changes and accessibility options matter for how you play.

Which version of CorsixTH should I download and where can I get it?

Download the latest stable release, CorsixTH 0.70.1, from the official project site at CorsixTH. Avoid the older 0.70.0 release candidates and beta builds listed on the same page unless you specifically want to test unfinished changes.

CorsixTH is a re-implementation of the Theme Hospital engine, so the download alone is not enough: you also need the original game's data files. The project page says you can use either the Theme Hospital demo or the full game, and points to GOG.com as one place to buy the full version. In practice, the full game gives you the complete campaign; the demo is a way to try the engine before buying anything.

Choosing between the available downloads

If you are unsure, start with the stable release plus the demo data to confirm CorsixTH runs on your machine. If it does and you want the full experience, buy Theme Hospital and point CorsixTH at those files instead. The project's development blog is worth skimming for notes on accessibility and upcoming changes, but it is not required reading before you play.

Can I run CorsixTH on Windows, macOS, or Linux?

Yes. CorsixTH is an open-source reimplementation of the Theme Hospital engine, and it is built to run on Windows, macOS, and Linux. The project's own download page points to these platforms, so you are not limited to one operating system.

The important catch is that CorsixTH is an engine, not the game itself. To play, you still need the original Theme Hospital data — either the demo or the full game. The page specifically mentions GOG.com as one place to get the full game. So your setup is really two parts: the CorsixTH engine for your OS, plus a legitimate copy of Theme Hospital.

Platform notes

• Windows: The most straightforward option. Download the CorsixTH release, install it, then point it at your Theme Hospital data files.
• macOS: Also supported. Because macOS changes security and architecture over time, check that the release you download matches your Mac and version of macOS.
• Linux: Supported, and often available through your distribution's package manager or as a release build. This is a common choice for players who prefer open-source software.

What to check before downloading

1. Confirm your operating system and version are covered by the current CorsixTH release.
2. Make sure you have Theme Hospital data files available (demo or full game).
3. Read the release notes for the version you plan to install, since fixes and platform-specific issues are listed there.

A practical next step: go to CorsixTH and look at the "Latest releases" section to pick the build for your OS, then follow the download instructions for linking your Theme Hospital data. If you do not yet own the game, the full version is sold at GOG.com, which the project names as an example source.