demo vs complete game

Hi,

I'm finishing a small game that I've been working on, that I'm planing to
sell online, and I'm wondering which should be the differences between the
demo and the registered game. For example here a few ideas:

- Offering new features: new levels, and new options (fullscreen,
highscores, etc).
- Displaying nag screens, and reminders.
- Limiting the play count.

I would like to hear other ideas and to know which of those techniques are
more effective in order to sell a game.

Thanks in advance,

--
Ignacio Castaño
[email protected]



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