We've let G have access to games for a long time. Long enough that he knows to avoid games that mom will think are bad. Like games with fighting, and nudity. His favorite are racing games. My favorite are ones that require some thought to figure out the puzzle, or achieve goals. Here are some.
Fire Boy Water Girl
Factory Balls (multiple editions including christmas)
Tree of Life
There are others I'm sure but I just wanted to make record that these are awesome.