[9, 20]. Players solve environment-based puzzles—like digging through dirt as Emile or cutting wire as Freddie—to progress [6, 19, 28]. A core pillar of the game is its historical accuracy . The developers collaborated with historians and used letters from the First World War as inspiration [9, 20]. As players explore, they find collectible items that unlock encyclopedic facts

Here is a for Valiant Hearts: The Great War .