Isostasy

Isostasy. Equilibrium. The balance between opposing forces. Hot and cold. Solid and liquid. Light and dark. Peth-Luk and Gol-Luk, the gods that emerged from the Isostasy at the initiation of the current Fathom...but those are only myths...

You play as Beihnn. Explore eight different zones with different terrain. Find items to help you progress, talk to other characters for hints, solve puzzles, and figure out how to defeat 9 different bosses.

The .NES ROM file is playable on any NES emulator or flash cartridge that supports the UNROM mapper (almost all do). I recommend Mesen.

The standalone Windows PC version has the ability to save games, including all explored map data, to a save file in your Documents folder automatically upon viewing your password. If you have a valid save file, it will auto-populate on the Enter Password screen. Extract the contents of the zip file to your preferred directory and run Isostasy.exe to play. You can then right-click Isostasy.exe and select "Pin to Start" to create a shortcut on the Windows Start Menu. To reach the settings screen (including controller configuration) press Select or the D key while the game is paused.

(Version 2.2 is the current official version of the game. I have left version 1.0 available for players who may prefer it for some reason. It contains glitches and sequence breaks that may be useful in speedrunning.)

The Isostasy website, including game instructions.

Isostasy is designed to be played with a monitor refresh rate of at least 60 Hz. Playing with a refresh rate below 60 Hz may result in a sub-optimal experience. If audio or video issues are encountered, please check your monitor's refresh rate and increase it if necessary. Also note that in a multiple monitor setup, the refresh rate of all monitors may be limited by that of the slowest monitor, depending on your hardware. Try turning off or disconnecting the slower monitor and see if that resolves any issues.