Developers can change these defaults using configuration variables in their options.rpy file: Save File Location? - Lemma Soft Forums
Ren'Py follows standard hidden directory conventions on Linux: ~/.renpy/ renpy game save location
In her mind, she walked the filesystem. C:\Users\Mina\AppData\Roaming\RenPy\Shepherds—she whispered the path like a spell. It felt oddly appropriate; a shepherd tending to characters she'd birthed. On Macs, she thought, maybe Library/Application Support/RenPy, quiet and dignified. On Linux, likely .renpy in the home directory—hidden, like the best parts of people's lives. The image pleased her: each operating system a different landscape where players' memories lay folded. maybe Library/Application Support/RenPy