One just unlocked for me today and I assume its because of Halloween so I bet the others might be time based as well.
The cheat i unlocked is
Makes pumpkins appear all-year-round
Originally Posted by Mattybell2117
He's starting to border that line though where it's hard to argue with him because he's so stupid. It's like playing chess with a pigeon. It doesn't matter how well you play, the pigeon's still gonna knock over all the pieces, poop on the board and strut around like he won.