I tried the coop missions on casual split screen, it's all I have left.. It's frustratingly stupid to do them by yourself and I can't play online because I have no code. It says I get to go to level 15 but jesus everyone plays on the hardest so I gained 5 levels and we didn't even beat the stage..
This upsets me, twas to be my 20th plat. Has anyone beaten the stages solo? Can someone give me a glimmer of hope? Lol.