I convert a .pdo file (papercraft) to a 3D printable object.
I have not tested the print yet.
Do not hesitate to leave your impressions.
I will shortly convert other objects, including Portal.
Original pdo file is from Evgeniy Pelevin

The Rollermine is an electrically charged, spherical device slightly larger than a soccer ball that reacts to movement within a sizable radius. As the name implies, Rollermines roll towards enemies and electrocute them via close-range electric shocks. They are primarily used as offensive and defensive traps by the Combine.

You have the both in the file.