Any free realistic military games with low requirements?
1. Get little sleep for a few days. 2. Stay up all night. 3. From midnight on, listen to a radio not tuned to any station. Just white noise. 4. At around 3-4am, start doing math problems - first level university algebra would be closest to accurate. Do them in a dark room, with no windows. DO NOT FALL ASLEEP. That is about as realistic as it comes to the military job that I did (Signals Intelligence).