I'm sure this is a question that I will feel really dumb for asking when someone answers it. I started playing sonic generations months ago and I have not played for a long time. I picked it up the other day and I'm not sure how to get to the next stage. I have made it through the first three or four stages now I get a prompt that says something to the effect of there is an unplayed stage see if you can find it, switch characters to play the stage. I doesn't look like they are any of the available stages that have not been finished. Do I have to play all of the stages with both the 2-D and 3-D characters? I did not think that was the way it was. Thanks for the help, I'm sure I'll feel like a complete and total moron when I get an answer.