Hi, If you wish to play R (Pron: Arrr...) using the supplied AdvPC / AdvPDA game engine (interpreter) then do as follows: - If playing on Windows Mobile devices install .net2 for PDA then run AdvPDA on the PDA. - If playing on Windows Desktop / laptop PCs, install .net2 (you will more than likely have it already) then run ADVPC. Do not run AdvPDA from a PC or you will get an error because the executable AdvPDA is compiled for a PDA CPU and not a PC CPU! Once running AdvPDA or AdvPC depending what device you are running on, press "Open other" and point it to the file R.dat in the R_Game_Data_File folder. If you do not wish to use the AdvPDA / ADVPC interpreter then the game file (R.dat) should run under most other freeware Scott Adams interpreters such as "ASFDDOS" / ScottFree for LINUX / MAC etc. Best regards and happy adventuring! therealeasterbunny