In the first part of the single-player campaign "Avanti Savoia", a pistol holster is hanged around Luca Cocchiola 's armor. Meanwhile, that pistol holster disappears just after beginning of the second part of the campaign.
During the Gallipoli mission, the Player's character heads to the beach with a standard Lee-Enfield rifle - but when it switches from cutscene to action, the Lee-Enfield has special sights on it.
Some of the weapons in the video games including the prototype weapons such as Hellriegel sub machine gun, Kolibri (added as a joke weapon), Cei-Rigotti, etc were never adopted in the military forces in real life.
Guns had flatter trajectories than depicted unless they were howitzers or mortars.
Airships were never deployed over a battlefield due to the danger of fire from the ground.
Although the Hellriegel M1915 was not used in the Great War, It had a 160 round drum magazine not 67 as portrayed in the game.
The Mark V tank could not travel nearly as fast as depicted.
Tracer bullets were mostly used in aircraft and not by ground forces.
Barrage balloons were not used over the Inited Kingdom in the Great War.
Germans are shown with gas masks aboard the Zeppelin. They do not need gas masks since there is no poisonous gas.
The shells ejecting from the German anti-aircraft trucks are almost as big as the guns mounted on them.
At no time in the war could German scouts ever make it to the United Kingdom; only bombers and Zeppelins had the range.
The song "Dream a Little Dream of Me" did not exist until 1931.
The Bergman 1918 was not available prior to 1918 however some levels set before that year are available.
Some German soldiers are shown using the spiked helmet after it was discontinued.
Electronic sirens and loudspeakers were not available during the Great War.
No small-caliber anti-aircraft gun was used in the Great War that had proximity ammunition.
Luca's armor is only scratched and dented after the rockslide, yet he still takes it off.
Observation balloons were mistakenly called 'barrage balloons'.
Only one gun is mentioned during the Alps mission, but there is a battery of three.