Inspired by the popular board game Operation, Surgeon Operator converts you in an amateur surgeon that has to do open-heart surgery, for which you will have all the tools of a real surgeon at your disposal.
The difficulty lies in its deliberately complicated gameplay. It assigns one key to each finger of your hand, which you can move and spin with the mouse. This turns something simple as taking a scalpel into an epic journey.
On the other hand, the difficulty is compensated by the possibility to make real damage during the surgery, giving chilling results but revealing a genius dark humor.
If you're not freaked out when tearing a lung from between the ribs or hammering a heart, then download Surgeon Simulator and you will have lots of fun!