[citation][nom]A Bad Day[/nom]Thank you for pre-ordering our game...In our inconsiderate thanks to such loyal fans, we will...1. Remove features that we previously promised, and put them in a DLC or in the "Gold Edition", which is not as same as the pre-order. Then, we'll remove some of the features from the DLC and "Gold Edition", and put them in the "Platinum Edition".2a. Release the game with several major bugs. Bug testing during development and beta takes too much work. We can always fix them later.2b. Put the bug fixes in the DLC. The DLC that requires payment of course.3. Release the game with half-baked concepts. Sorry that our trailers and the reviewer lied to you and made you expect more than we were willing to give you.[/citation]
point 1, a crappy practice, but its rare for what is taken out to be significant, baring capcom games, where they remove the real ending to the game and make you pay for it.
2a on the pc side, many setups and you cant test them all no mater how much you try. on the console side, you are under deadlines for many projects. no one goes into a game and just makes them good enough (at least on the primary platform)
2b a crappy and lesser done practice, and is only really done when its a bug with a core mechanic. still, its indefensible.
3, in that case, you could take them to court over false advertising if you cant get your money back.
i would add one to that,
4) adding dlc to in game content so you always see it, but cant access it without buying it.
dragons age
forza 4
those are two that are blatant about it, i cant think of others but i know there are others.