On linux: was able to follow the steps from Ross to play it
- Get Linux and Mac zip files
- extract the mac zip
- navigate into it to the resources folder (macos/The Sisyphean Chamber.app/Contents/Resources/)
- grab the .pck file, put it with the linux file and make sure they are both named the same (I used The Sisyphean Chamber.pck and The Sisyphean Chamber.x86_64)
Fun game! I got to wave 18 with Katana, and spiderman crawling up the walls with Fists is just fun