Well, I have the Complete Edition of the game, everything is fine until the Lightning Strike mission, when i finish it, it won't unlock the next level. I played again and nothing, any recomendation for this?

Which game?

Though if it's a common problem, going to the game-specific forums may already have someone who has a workaround for it.

It was World In Conflict, but now i fixed the problem, I was doing "repeat mission" but not "continue mission". Almost lost it.