SIGNAL (IMAGE) University of California - Berkeley Caption Demo of SIGNAL, a new multi-player computer game that was custom built to explore deterrence and decision-making in an escalating nuclear conflict. Credit Photo by: Lorenzo Vidali, Sandia National Laboratories Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.