Valiant Hearts isn't your usual war game. You won't be blasting through thousands of bad guys like BJ Blazkowitz, you won't be commanding an entire army like an over-the-top Command & Conquer general. Valiant Hearts is incredibly story focused, as it considers itself more of a playable comic book than a video game. It's also about World War I, which hasn't exactly been a popular subject for video games.
This trailer is for the PC and console version, but the mobile version looks very similar.