The front sight of the ISA's main rifle isn't visible when aiming.
Spelling mistakes in subtitle dialogue.
For some reason the dropships all have open troop compartments. There are three things wrong with this; first, this would expose the troops to enemy fire; second, this would make the troops liable to fall off; third, this would make it impossible for the dropships to be used in high atmosphere as seen in the game without exposing the troops to high altitude conditions.
Even though Sergeant Sevchenko is a Sergeant, loser ranked characters often tell him what to do.
Corporal Garza asks Sergeant Sevchenko to call an elevator, even though the elevator s already there.