Summary. On this page I show how to optimally play the gambling mini-game Quasar (from BioWare's Mass Effect game), and I state what the expected returns. This short video shows a simple strategy on how to play and succeed at Quasar. Using this strategy will - in the. quasar powered by a black hole with a mass two billion times that of the Sun. Credit: ESO/M. Kornmesser. A quasar (/ˈkweɪzɑːr/) (also quasi-stellar object or QSO) is an active galactic nucleus of very .. In the gravitational lens effect predicted by Einstein's General Theory of Relativity was confirmed observationally.