Read Me First. You have to have a compatible S60 or S80 phone. Tested phones are Nokia models NGage, NGage QD, 6620, 9500, 9300, 7610, 6681, 6680, 6630, 6600 and 6260. However all S80 phones and S60 phones that have at least 16MB RAM, S60 1.2 or S60 2.x should work. 9210x, 7650 and 3650 are not supported. make sure yours mobile support with zip file. Extract file, install the c2doom_s60 or c2doom_s60(1.02) or c2doom_s80. Go to main menu search the game and launch.