Psion Series 3a Risk 101b Cost: Free Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Psion Series 3a Risk 101b: Welcome to RISK for the PSION Series 3a. The game is based entirely on the board game by Parker Brothers USA and is for 2 to 6 players.