The weapon may also be found in the hands of certain Austro-Hungarian Assault soldiers, although this is very rare. The MP 18 is used heavily by German Empire infantry in every campaign mission they appear in. The MP 18 is a weapon featured in Battlefield 1 for the Assault kit. Highly effective at its role it was nicknamed the 'grabenfeger' by German soldiers.' 'The MP 18 was one of the first practical submachine guns to see combat. The MP 18 and MP 40 are identical in terms of stats and function. The Thompson, however, surpasses its counterparts in rate of fire, at 600 rpm versus 540 rpm of the MP 18, giving the Thompson a slight edge when up close. When comparing the MP 18 to the Allies' Thompson, both weapons have identical spread, damage and recoil patterns, and only differ in reload time and magazine capacity, with the MP 18 being slightly faster by 0.5 seconds, and with two more bullets in the magazine. As with other submachine guns, the MP 18 is, therefore, better suited to close-quarters engagements, as well as shooting on the move thanks to its weapon type having the lowest max spread deviation. This, along with high spread deviation with long shots, makes the MP 18 a poor choice for long range engagements, at which the gun is only semi-effective even when fired prone and in bursts or single shots. Although the MP 18 has low recoil per shot, during sustained firing its high rate of fire can make controlling the weapon difficult, throwing the user's aim up and to the left or right. It requires four shots to the body to kill at minimum range, and seven at one hundred meters and beyond.

The weapon has a high rate amongst all infantry weapons at 540 rpm, but with a lower damage per shot compared to assault rifles and light machine guns available to the Assault kit. The MP 18 is a weapon featured in Battlefield 1942, issued to the Imperial Japanese Navy and Red Army Medic kits.

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