Can we force user to 'Like' a fan page from our facebook application?

everyone. I hope my question will not waste your time.

Does Facebook allow us to force a user to 'Like' a Fan Page (which is not relate to the Facebook application)? In my case, user can click 'Like' button to get more attack point in the game. In my idea there are 2 cases:

1. Provided only 'Like' button, this forces user to click 'Like' a Fan page without another option.
2. Provided 'Like' button and 'No, thank' button. This provides user 2 options开发者_StackOverflow社区 to go.

I want the first option. The application also describe the detail of Fan Page.

Can I do this without harm Facebook's policy?

Is attack point OPTIONAL? If you're forcing them to like to just use your application it's not like you would get many users.