Valiant Hearts: The Great War® | Ubisoft (EU / UK)
WWI: Source - July 2013 Update news - Screaming Steel: 1914-1918 mod for Day of Infamy - ModDB
COD] I would love to get a World War 1 COD game made by Treyarch, acting as a spiritual successor/prequel to World At War. The style and grittiness of WaW would fit