Build the castle, feed the people, then discover your friend brought horse archers.
Stronghold Crusader HD is a free strategy game released under Commercial · DRM-free purchase. It runs on Web, Windows, needs about 850 MB of disk space, and requires no account, payment or trial. Download it from the official site at https://www.gog.com/en/game/stronghold_crusader.
Windows
Download the DRM-free Stronghold Crusader HD offline installer from GOG. Galaxy is optional; the offline files are sufficient.
Windows
Run the game once, set the resolution, and confirm that a Crusader Trail or skirmish save works before applying an edition.
Windows
For multiplayer, keep every player on the same version, create a PlayBound Connect party, then host or join through the virtual LAN address.
Minimum
Modern web browser
Recommended
Modern web browser
No. It is a paid commercial master copy. The GOG release is DRM-free and does not require Galaxy.
Yes. It supports LAN and direct-IP matches. PlayBound Connect can place a private party on one virtual LAN without relying on GameRanger.
Use the Unofficial Crusader Patch edition for balance, AI, and quality-of-life options. Stronghold Europe is a separate total conversion with a different setting.
Stronghold Crusader supports skirmish matches with up to eight total human and AI lords, subject to the chosen map and matching game versions.