A triple-double is when a player reaches double figures in three of five offensive categories - scoring, assists, blocked shots, steals or rebounds. The easiest way to do this is put the game on rookie and choose any team. Now, you must go into options and toy around with the sliders. Give yourself full three pointers, blocks, rebounds, etc and put them all down for the CPU. Set the game to a time you think you'll be able to achieve them all. For some people they can use 3 minute quarters (total 12 minutes) and earn every achievement. For others it may be different (recommend 12 minutes in total to ensure you receive all achievements). For all the achievements, use The Western All Stars.