The Gemini Program, announced after the last Mercury Project, had a two man crew, wanted to orbit the earth for up to two weeks, launch perfectly every time, and  land in a precise area that was later discarded.

Gemini I and II were both unmanned missions testing out the shuttles capabilities.  The First was launched on April 8, 1964 and the second on January 19, 1965.  Unlike the second shuttle the first wasn't supposed to land and it was destroyed.  The second landed and was recovered.

Gemini III was commanded by Virgil Grissom and piloted by John Young.  They were launched March 23, 1965.  There object was to demonstrate all the new features such as prelaunch and launch procedures.  They were in space for only four hours but the launch was a success even though their landing was off target.

Gemini IV was commanded by James A. McDivett and  piloted by Edward White.  They were launched June 3, 1965 and were to demonstrate the effects of a long space flight and figure out a schedule for eating, rest, etc.  The landing was off like the last Gemini and were in space for four days.

Gemini V was commanded by Gordon Cooper and piloted by Charles Condrad.  They were launched August 21, 1965 and they were to show the effects of eight days in space and use a new computer landing system.  They missed the landing zone by an area much farther away from the previous landings and by using a new computer system it was supposed to help, this mission wasn't accomplished.

Gemini VI-A commanded by Walter M. Schirra and piloted by Thomas P. Stafford was launched December 15, 1965 and were in space a day.  They were to complete three expirements, conduct visibility tests and use a new guidance system.  Everything was accomplished.

Gemini VII commanded by Frank Borman and Piloted by James A. Lovell was launched December 4, 1966 and was to set a dock point.  They were in space 14 daysand gave the effects. The mission was ruled an accomplishment.

Gemini VIII commanded by Neil Armstrong and piloted by Richard Gordon was launched on May 16, 1966. Their objective was to practice docking then dock with another Gemini.  The two gemini's docked for thirty minutes until the crew were unable to control the two.  Besides the minor mishap this was ruled a success.

Gemini IX-A was commanded by Thomas Stafford and piloted by Eugene Cernan was launched on June 3, 1963.  The original crew died in an airplane crash so the back ups were named primary crew.  They were to practice docking and then dock, and perform expirements.  This mission was semi accomplished because the Gemini did practice docking they never were able to dock.

Gemini X was commanded by John Young and piloted by Cliff Williams was launched July 18, 1966.  They were in space 70 hours and completed 43 orbits in their quest to practice docking positions.  They were able to finish most of the docking positions but some were cancelled due to low gas levels.

Gemini XI was commanded by and piloted by was launched Spetember 12, 1966.  They were to dock with another Gemini and perform 11 expirements.  They were able to dock and preform most expirements and the mission was a semi success.

Gemini XII was commanded by James a Lovell and piloted by Edwin Aldrin was launched November 11, 1966.  While they were in space for about 96 hours they were to perform docking, expirements, and system tests.  90% of all the objectives were met but the last were cancelled after the gas was nearly used up after all the practice docking.

Information: ksc.nasa.gov