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Valiant Hearts: The Great War - It's a personal favourite of mine. The story is absolutely amazing and I almost cried when I finished the game.
This War of Mine - It's currently available for tablets only but a smartphone version is in the works. This is also a great game.
My previous post was removed because it did not follow the rules. So here's a new one.
I learned about this through a game called Valiant Hearts The Great War. Here's the screenshot. This game is about WW1 and there's a lot of info about WW1 in this game.
Play Store link for anyone who is interested.
Here's the link to Play Store. I played this on my Android phone. It's also available on Steam (I don't play games on PC, so I may be wrong). If you decide to buy the game on Android, install the version that I have linked and purchase the IAP to unlock all chapters for ₹490. There's also a paid version in Play Store with no IAPs but it's very expensive at ₹1156 (don't know why). Both are the exactly the same game.
Valiant Hearts: The Great War https://play.google.com/store/apps/details?id=com.ubisoft.adventure.valiant_hearts_trial The Wolf Among Us https://play.google.com/store/apps/details?id=com.telltalegames.fables100 Superbrothers Sword & Sworcery https://play.google.com/store/apps/details?id=com.capybaragames.sworcery