Darkest Hour: Europe '44-'45 is a free modification developed by Jackboot Games (formerly known as The Darkest Hour Team) for Tripwire Interactive's multiplayer first-person shooter video game Red Orchestra: Ostfront 41-45, It is based on the Western Front during World War II between 1944 and 1945, depicting the conflict between Allied and German forces. Several large-scale operations are covered, including the invasion of Normandy, Battle of the Bulge, Operation Market Garden, and Battle of the Hürtgen Forest.