From version 1.4.4, desktop versions on Windows, Mac, and Linux support the following optional command line switches:
nosync
Disable v-sync. This has the potential to cause problems with the game's admittedly limited physics.
stretch
Stretch the game to fill the entire screen. This will remove most of the border but may result in blurry pixels.
fps
Show a tasteful framerate meter.
savedir <directory>
Override the default save directory. Enclose directory in quotes if it contains spaces.
From version 1.4.11
720p
Force fullscreen mode to switch the monitor into 1280x720 resolution (if supported)
1080p
Force fullscreen mode to switch the monitor into 1920x1080 resolution (if supported)
Example
> PapersPlease.exe nosync stretch savedir "C:\Saves"