If you haven't played the frankly amazing Valiant Hearts yet, you should really look into it soon. The sidescroller is one of Ubisoft's best games of 2014.
Set during the First World War, you play as four seperate characters at different points. The main character (a French farmer drafted into the army), his son-in-law, a German national, called back to join the fight. An American Volunteer and a paramedic. You switch between them in certain missions to solve puzzles with the help of your faithful friend, a loyal canine, Walt.
The puzzles get slightly more complicated and the collectables give you historical values to what is going on around you. Everything you can learn are poignent reminders of what they fought for. Learning the war (vaguely) from both sides of the conflict, but also a personal experience as you follow one families struggle to survive and get back together.
The great writing will draw you in to care about the characters, where other games tend to fail.
The sound that accompanies the game is spot on, it gives you an added feeling of impending doom, of joy and sadness.
You'll want to play it again just for the beautiful story and well crafted animations, even after achieveing the max trophies/achievements.