The phrase "additional missions" is correct and usable in written English.
It can be used when referring to extra tasks or assignments that are added to an existing list of responsibilities or objectives.
Example: "The team was assigned additional missions to complete by the end of the month."
Alternatives: "extra tasks" or "supplementary assignments".
NASA has no additional missions planned for the ringed planet, though several proposals are in the works.
The Savannah was inactivated that fall but recalled for several additional missions before being taken out of service for good in 1862.
It's a more substantial campaign than you'll find in recent shooters such as Homefront, with additional missions and secrets adding replay value and a certain self-awareness that was lacking from the rather humourless original.
During the next three days, the lidar plane flew additional missions, this time over T2 and T3; by the time they were done, the team had mapped fifty-five square miles of Mosquitia rain forest.
Officials said the National Guard and Reserves, which as of Wednesday had 201,099 members on active duty, would probably have to shoulder some of the burden of any additional missions as well.
While the previous game explored Florence, Venice and Tuscany, the action here is spread across a single large area of Rome, though playable flashback sequences and additional missions take Ezio outside the city walls.
Applying neuroscience in this way will become an additional mission for ECNP.
His task could easily become complicated by the actions of drivers around him and the additional mission of making sure Renault also win the constructors' championship.
But each additional mission served to underscore U.S. superiority over the Soviets in space, effectively giving the U.S. return on its investment along the way.
To even consider falling below the strength that Mr. Brown said he needed in 1990 -- especially at a time when the department has the additional mission of guarding against terrorism -- would seem to be folly.
But if the lazy, freeform rhythms of the main storyline prove too unfocused for some players, an additional mission mode offers a number of short-paced challenges in which you must, for example, collect all the fruit in an environment against the clock, competition for a gold, silver or bronze medal.
