Sorry for taking so long to get back to this, I got distracted with other games.
No directory named '~/.local/Zombasite' exists. However, there is a '.local/DroxOperative/User/log.txt' file with timestamps indicating it's touched when Steam runs Drox, which contains 3 lines:
Couldn't find translation file lang/layoutLinux.loc!
Couldn't find keynames file lang/keyNames.loc!
Safe and dependant systems initialized
When I try running DroxOperative directly, it gives an error about libsteam_api.so, even though that is in the directory:
Assets changes.txt DroxOperative EULA.txt FontLicense.txt libsteam_api.so manual.txt OtherLicenses.txt User
./DroxOperative: error while loading shared libraries: libsteam_api.so: cannot open shared object file: No such file or directory
If I watch Steam's output when failing to start Drox, there's nothing that looks like an error.