A couple of weeks back Namco Bandai released a game on the Xbox 360 and PlayStation 3 by the name of Inversion. While the game never really received a huge amount of press, the crux of the title was that the player had the ability to shift, or in this case invert, gravity, in order to manipulate the environment and gain an advantage over enemies.
Around the same time, The Inversion Project shot its way onto iOS. This free-to-play facsimile of the console game's universe was primarily aimed to increase the public's awareness of the full release. On top of that, this third person shooter acts to help gamers familiarize themselves with some of the core mechanic of the world. Check out this gameplay video to get a better idea of what is in store.
For a completely free title, it looks like there are at least some innovative gameplay ideas at work. For that price, you can afford to roll the dice and check it out. Let us know what you think of it in the comments.