Basic Game Only: Apply a -2 modifier to any one skill check involving one of the following skills: CRIMINAL INVESTIGATION, SUBTERFUGE, COMPUTER. Advanced Game: Pay the listed Cost, where X = the number of paid to gain the desired modifier to one of the following skills: CRIMINAL INVESTIGATION, SUBTERFUGE, COMPUTER. (1) = -1, (3) = -2, (5) = -3, (9) = -4