The "Cheats" checkbox in the game preferences is a hidden feature currently under development that acts as a "Harem Mode"
But PA never shipped as a standalone product. Instead, its code was allegedly between 1996–2002 as a hidden testbed. project atmosphere cheats
Alternatively, the user might have a typo and mean another project. For example, Project Atmosphere could be a misspelling of "Project Atmosphere" in a different game or a specific educational project. Let me think of possible alternatives. There's a game called "Atmosphere" on Steam, but not sure if it's Project Atmosphere. Or maybe the user is referring to a game mod that simulates atmospheric conditions. The "Cheats" checkbox in the game preferences is