This in turn is unfortunately one of the weaknesses of "Valiant Hearts": It is not very long (much longer than 6 hours play time are not.!). The compulsory courses in adventure style puzzles and mini-games are mostly not really crisp and demanding. I'd rather call it "supervised play". However, this is not as derogatory as it sounds. "Valiant Hearts" could also be a pure animated film ... and he would go near me and remember.
The great drawings and the wonderfully coordinated soundtrack create a mood that is suction-like part: It ranges from dramatic (sometimes drastic) scenes - for example, on the battlefield or in the hospital - on quieter moments to ridiculously exaggerated scenes that already slapstick character (for example in car chases). One sometimes thinks: Can the match? On the one hand a frighteningly realistic picture of war - works here "Valiant Hearts" not in spite of, but because of his comic style. On the other hand scenes where you smile or laugh too must - again, it works for the same reasons. This mixture is not completely new, yet refreshingly uncommon, and that's what makes the whole thing around and makes a thoughtful yet back.
The developers have certainly not done everything right (a little more demanding and longer might be already "Valiant Hearts"). But for a total atmospheric gaming experience, the 15 calls to my mind too much. Strong buy recommendation !!