The Sten Mark V appears in the expansions of Allied Assault. In Spearhead it was used by Sgt.Barnes and Foxhound during the Normandy campaign. In Breakthrough Sgt.Baker uses a Sten Mark V during the Monte Cassino campaign along with British soldiers. The Sten has low damage but high rate of fire. It is best suited in close quaters engagements. For longer ranges it is advised to fire it in short bursts to maintain accuracy. In both games' multiplayer the Sten is available for the British soldiers as a starting weapon. In game the Sten is incorrectly called "Sten Mark II" however it is the Mark V variant since it has the wooden grip and stock.
The version encountered in-game is not usable by the player and is exclusive to NPCs. The variant encountered in the game is only seen in the level, Arnhem Knights. The variant behaves in the same manner as the StG-44 and even uses the same firing sounds as the StG-44. The model of the Sten Mark II appears to be an unsuppressed variant. Sergeant Kelso always has one weapon.
The Mk IIS — a silenced variant of the Mark II - appears in Medal of Honor: Rising Sun. It is first usable in Mission 6: Singapore Sling when it is given to the player by Phillip Bromley after his attempted impersonation of Colonel Kandler is compromised. It is then available as a starting weapon for the rest of the game, except in the level A Bridge on the River Kwai. The Sten only has 20 rounds in it's magazine, and can be emptied rather quickly. The Sten has good rate of fire but poor damage. It is advised to aim for the head, due to the low torso damage. The Sten was the primary weapon of choice for Phillip Bromley and for the Chindit soldiers as well.
Sten Mark II Silenced in Medal of Honor: Rising Sun
In Rising Sun the Sten holds 20 rounds, but it's model shows a 32 round magazine.
In the briefing of level 2 of mission "Occupied!" in Medal of Honor Underground, as mentioned above, it is said that the Sten would be compatible with the magazines of the MP-3008. The MP-3008 was a German clone of the Sten gun made in 1945, making this an anachronism.