what are the collectibles.

As I said before, try checking out the player reviews and also the demo for the game. The player reviewer pennmom usually mentions collectibles if there are any.

i did they stop posting them.

That reviewer still mentions collectibles. If you found a review where she doesn't mention them, it's probably because it was an older game that didn't have any.

https://www.bigfishgames.com/games/11461/redemption-cemetery-at-deaths-door-ce/?pc

According to this, there are collectibles. When you look up a game on BFG website, make sure you choose the PC versions. The iPhone and iPad versions don't have the full information. It appears the demo is no longer available. But reviews are.

i found it in the guide, i have 1 collectible.