Originally Posted by MeonOner
The best advice I can give is replay each single player levels again and collect all secondary objectives. Because if you farmed for money on a specific level and did not collect all secondary objects and complete the level, the game doesn't register that level to be 100% completed.
Did that, just finished final level. Oddly enough, it was the only level that listed all Secondary Objectives finished before I started it. But the achievement still hasn't popped. Sad thing is, I like the game. It is fun, despite the off graphics, I enjoy it.