Hello, my first post here. I would like to put my game on itch.io. I wish to make the game first half as free to play, and then the player has to pay for the second half.  May I ask does  itch.io support IAP? Particularly for games made by Unity?

Otherwise, may I use Paypal IAP inside the game? Or are there other solutions that can achieve the desired effect and work best for itch.io?

Thank you very much for your help.

For now, one solution would be to make the first half of the game a separate download that you mark as a demo, so people can download it for free. If they buy the game, then they can also download the full version. About in-game purchases, I don't think we have a rule against it, but web games sometimes have trouble talking to 3rd-party servers, because iframes. Might want to run some tests first.