Hydra
Hydra plays GemStone IV, Simutronics’ text game. One Hydra holds every character you play at once: each has its own window, or none, and all of them keep playing while Hydra rests in the background. A phone or another computer on your home network shows the same characters on Hydra’s web page, and the HydraFE app plays on an iPhone or iPad by itself.

Downloads
Every release is on the releases page:
- Windows:
hydra-windows-x86_64.zip - macOS (Apple silicon):
hydra-macos.dmg, or the barehydra-macos-arm64.zip - Linux:
hydra-linux-x86_64.tar.gz, for glibc 2.39 or newer - iPhone and iPad: HydraFE, through TestFlight
The guide’s pages are coming, group by group: getting started, the play window, playing, and the phone and web page. The API reference is the whole of Hydra’s code, documented, for anyone writing against it.