I know there was a thread about this I read a while back but cant find it anymore. What do the stars mean when your about to start a mission. I beat the game already, some on single, some on co op, the ones I beat on single have 2 stars? Does that mean I beat the map on secret agent? If I beat most of them on secret agent, do I still have to go back after and beat it on regular agent?

Correct, secret agent (normal difficulty setting) is two stars. The hardest difficulty setting (cannot remember what's it's referred to) is 3 stars.

Regular agent (easiest diffuculty setting) is only one star.

Thanks

Perfect agent is the 3 stars.

thats not the hardest difficulty, after you beat all the missions on perfect agent, you will unlock dark agent (i haven't done this yet, but its in the achievements, and other people have, i belive dark agent is 4 stars)

so basically

agent = 1 star
secret agent = 2 star
perfect agent = 3 star
dark agent = 4 star

and i got the agent and secret agent mission complete achievement at the same time for beating all the levels on secret agent (never player regular agent)